http://col.osa.org Chinese Optics Letters Tue, 01 May 2012 00:00:00 EST http://metadata.osa.org/rss/infobase/images/col.gif http://col.osa.org Optical Society of America © 2012 Optical Society of America 2012-05-16 http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-050101 Zongming Tao, Dong Liu, Zhiqing Zhong, Bo Shi, Miao Nie, Xiaomin Ma, Jun Zhou<br/>A three-wavelength lidar system is set up. The backscatter signals of 355, 532, and 1 064 nm are measured simultaneously to derive the optical depth, lidar ratio, and backscatter color ratio of cirrus clouds, respectively. The lidar configuration ... [Chin. Opt. Lett. 10, 050101- (2012)] Tue, 01 May 2012 00:00:00 EST Measurements of cirrus clouds with a three-wavelength lidar Zongming Tao Dong Liu Zhiqing Zhong Bo Shi Miao Nie Xiaomin Ma Jun Zhou A three-wavelength lidar system is set up. The backscatter signals of 355, 532, and 1 064 nm are measured simultaneously to derive the optical depth, lidar ratio, and backscatter color ratio of cirrus clouds, respectively. The lidar configuration ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-050101 Chinese Optics Letters, Vol. 10, Issue 5, pp. 050101- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-050102 Zhechao Qu, Chunming Gao, Yanling Han, Xiaosong Du, Bincheng Li<br/>Chemical warfare agents (CWAs) are recognized as serious threats of terrorist acts against the civilian population. Minimizing the impact of these threats requires early detection of the presence of CWAs. Cavity ring-down spectroscopy (CRDS) is an ... [Chin. Opt. Lett. 10, 050102- (2012)] Tue, 01 May 2012 00:00:00 EST Detection of chemical warfare agents based on quantum cascade laser cavity ring-down spectroscopy Zhechao Qu Chunming Gao Yanling Han Xiaosong Du Bincheng Li Chemical warfare agents (CWAs) are recognized as serious threats of terrorist acts against the civilian population. Minimizing the impact of these threats requires early detection of the presence of CWAs. Cavity ring-down spectroscopy (CRDS) is an ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-050102 Chinese Optics Letters, Vol. 10, Issue 5, pp. 050102- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-050501 Barerem-Melgueba Mao, Yizhen Wei, Bin Zhou<br/>The performances of two liquid level sensors based on long-period fiber gratings are studied. The long-period gratings (LPGs) have similar characteristics (length and period), but are fabricated with two photosensitive B-Ge co-doped fibers with ... [Chin. Opt. Lett. 10, 050501- (2012)] Tue, 01 May 2012 00:00:00 EST Comparative study of fiber optic liquid level sensors based on long-period fiber gratings with different doping concentrations Barerem-Melgueba Mao Yizhen Wei Bin Zhou The performances of two liquid level sensors based on long-period fiber gratings are studied. The long-period gratings (LPGs) have similar characteristics (length and period), but are fabricated with two photosensitive B-Ge co-doped fibers with ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-050501 Chinese Optics Letters, Vol. 10, Issue 5, pp. 050501- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-050601 Heng Zhou, Kun Qiu, Fengfeng Tian<br/>We describe a novel performance optimization method for all-optical amplitude reshaping via degenerated four-wave mixing (FWM) in highly nonlinear optical fiber. The proposed optimization method is achieved by judiciously configuring the FWM ... [Chin. Opt. Lett. 10, 050601- (2012)] Tue, 01 May 2012 00:00:00 EST Optimized all-optical amplitude reshaping by exploiting nonlinear phase shift in fiber for degenerated FWM Heng Zhou Kun Qiu Fengfeng Tian We describe a novel performance optimization method for all-optical amplitude reshaping via degenerated four-wave mixing (FWM) in highly nonlinear optical fiber. The proposed optimization method is achieved by judiciously configuring the FWM ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-050601 Chinese Optics Letters, Vol. 10, Issue 5, pp. 050601- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-050602 Zhitong Huang, Yuefeng Ji<br/>We present a network-level signaling mechanism for user access and service setup in light emitting diode (LED)-based visible light communication (VLC) networks and define the corresponding signaling messages. In this mechanism, lamp selection is an ... [Chin. Opt. Lett. 10, 050602- (2012)] Tue, 01 May 2012 00:00:00 EST Efficient user access and lamp selection in LED-based visible light communication network Zhitong Huang Yuefeng Ji We present a network-level signaling mechanism for user access and service setup in light emitting diode (LED)-based visible light communication (VLC) networks and define the corresponding signaling messages. In this mechanism, lamp selection is an ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-050602 Chinese Optics Letters, Vol. 10, Issue 5, pp. 050602- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-050603 Yue Ma, Xueguang Qiao, Tuan Guo, Ruohui Wang, Jing Zhang, Yinyan Weng, Qiangzhou Rong, Manli Hu, Zhongyao Feng<br/>A simple fiber tip sensor for refractive index (RI) measurement based on Fabry-Perot (FP) interference modulated by Fresnel reflection is proposed and demonstrated. The sensor head consists of an etching-induced micro air gap near the tip of a ... [Chin. Opt. Lett. 10, 050603- (2012)] Tue, 01 May 2012 00:00:00 EST Temperature-independent refractive index measurement based on Fabry-Perot fiber tip sensor modulated by Fresnel reflection Yue Ma Xueguang Qiao Tuan Guo Ruohui Wang Jing Zhang Yinyan Weng Qiangzhou Rong Manli Hu Zhongyao Feng A simple fiber tip sensor for refractive index (RI) measurement based on Fabry-Perot (FP) interference modulated by Fresnel reflection is proposed and demonstrated. The sensor head consists of an etching-induced micro air gap near the tip of a ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-050603 Chinese Optics Letters, Vol. 10, Issue 5, pp. 050603- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-050604 Wendi Wu, Tingqi Ren, Jun Zhou, Songtao Du, Xia Liu<br/>A pulsed master oscillator power amplifier system is constructed using a double-cladding polarized Yb-doped fiber and an all-fiber Q-switched narrow-linewidth pulsed laser used as seed laser. This system has a high repetition rate and provides a ... [Chin. Opt. Lett. 10, 050604- (2012)] Tue, 01 May 2012 00:00:00 EST Frequency doubling of narrow-linewidth pulsed fiber laser Wendi Wu Tingqi Ren Jun Zhou Songtao Du Xia Liu A pulsed master oscillator power amplifier system is constructed using a double-cladding polarized Yb-doped fiber and an all-fiber Q-switched narrow-linewidth pulsed laser used as seed laser. This system has a high repetition rate and provides a ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-050604 Chinese Optics Letters, Vol. 10, Issue 5, pp. 050604- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-051401 Qiong Zhou, Sensen Li, Chaohong Huang, Lujian Chen, Huiying Xu, Shou Liu<br/>A two-dimensional (2D) distributed feedback (DFB) structure is fabricated on dye-doped sol-gel derived hybrid zirconia films by soft lithography. The Q-switched Nd:YAG laser (λ = 532 nm) is used to pump these structures. The lasing emissions ... [Chin. Opt. Lett. 10, 051401- (2012)] Tue, 01 May 2012 00:00:00 EST Two-dimensional DFB laser fabricated on dye-doped hybrid zirconia film by soft lithography Qiong Zhou Sensen Li Chaohong Huang Lujian Chen Huiying Xu Shou Liu A two-dimensional (2D) distributed feedback (DFB) structure is fabricated on dye-doped sol-gel derived hybrid zirconia films by soft lithography. The Q-switched Nd:YAG laser (λ = 532 nm) is used to pump these structures. The lasing emissions ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-051401 Chinese Optics Letters, Vol. 10, Issue 5, pp. 051401- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-051402 Ming Chen, Xiangdong Liu, Yuehua Liu, Mingwen Zhao<br/>The circular-like sidewall and trench around the periphery of the crater are obtained on Zinc metal surface subjected to fewer than 200 cumulative pulses laser ablation. These patterns can be attributed to the higher secondary heating by regular ... [Chin. Opt. Lett. 10, 051402- (2012)] Tue, 01 May 2012 00:00:00 EST Characterization of regular periodic surface structure by multi-pulse laser irradiation of a Zinc target Ming Chen Xiangdong Liu Yuehua Liu Mingwen Zhao The circular-like sidewall and trench around the periphery of the crater are obtained on Zinc metal surface subjected to fewer than 200 cumulative pulses laser ablation. These patterns can be attributed to the higher secondary heating by regular ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-051402 Chinese Optics Letters, Vol. 10, Issue 5, pp. 051402- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-051403 Haibin Lv, Pu Zhou, Hu Xiao, Xiaolin Wang, Zongfu Jiang<br/>We demonstrate a 30-W all-fiberized laser in a master oscillator power amplifier (MOPA) structure with a central wavelength of 1 950 nm. The laser is a continuous-wave (CW) operation with double-clad Tm-doped silica fiber pumped by pigtailed laser ... [Chin. Opt. Lett. 10, 051403- (2012)] Tue, 01 May 2012 00:00:00 EST All-fiberized Tm-doped fiber MOPA with 30-W output power Haibin Lv Pu Zhou Hu Xiao Xiaolin Wang Zongfu Jiang We demonstrate a 30-W all-fiberized laser in a master oscillator power amplifier (MOPA) structure with a central wavelength of 1 950 nm. The laser is a continuous-wave (CW) operation with double-clad Tm-doped silica fiber pumped by pigtailed laser ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-051403 Chinese Optics Letters, Vol. 10, Issue 5, pp. 051403- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-051404 Zhenfang Fan, Hui Luo, Guangfeng Lu, Shaomin Hu<br/>Lock-in phenomenon in ring laser gyroscopes is directly related to effective backscattering, which includes both backscattering and nonuniform loss. Effective backscattering often differs in different states and can only be reflected in a working ... [Chin. Opt. Lett. 10, 051404- (2012)] Tue, 01 May 2012 00:00:00 EST Online effective backscattering estimation for ring laser gyro Zhenfang Fan Hui Luo Guangfeng Lu Shaomin Hu Lock-in phenomenon in ring laser gyroscopes is directly related to effective backscattering, which includes both backscattering and nonuniform loss. Effective backscattering often differs in different states and can only be reflected in a working ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-051404 Chinese Optics Letters, Vol. 10, Issue 5, pp. 051404- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-051601 Yujie Du, Benkang Chang, Honggang Wang, Junju Zhang, Meishan Wang<br/>We employ plane-wave with ultrasoft pseudopotential method to calculate and compare the total density of states and partial density of states of bulk-phase GaN, Ga0:9375N, and GaN0:9375 systems based on the first-principle density-functional theory ... [Chin. Opt. Lett. 10, 051601- (2012)] Tue, 01 May 2012 00:00:00 EST First principle study of the influence of vacancy defects on optical properties of GaN Yujie Du Benkang Chang Honggang Wang Junju Zhang Meishan Wang We employ plane-wave with ultrasoft pseudopotential method to calculate and compare the total density of states and partial density of states of bulk-phase GaN, Ga0:9375N, and GaN0:9375 systems based on the first-principle density-functional theory ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-051601 Chinese Optics Letters, Vol. 10, Issue 5, pp. 051601- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-051901 Yishen Qiu, Enguo Chen, Gaoming Li, Hui Li<br/>The fluorescence power from biological tissue excited by a femtosecond laser pulse compared with excitation power does not appear to obey a simple quadratic relationship given by the steady non-linear theory. A more reliable analysis is developed ... [Chin. Opt. Lett. 10, 051901- (2012)] Tue, 01 May 2012 00:00:00 EST Investigation of transient two-photon excited fluorescence in biological tissue Yishen Qiu Enguo Chen Gaoming Li Hui Li The fluorescence power from biological tissue excited by a femtosecond laser pulse compared with excitation power does not appear to obey a simple quadratic relationship given by the steady non-linear theory. A more reliable analysis is developed ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-051901 Chinese Optics Letters, Vol. 10, Issue 5, pp. 051901- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-052301 Hongyu Xing, Wenjiang Ye, Naifu Wu, Zhidong Zhang, Li Xuan<br/>We present a theoretical calculation of the dependence of reflectivity Rpp of the improved fully leaky waveguide geometry, which comprises pyramid, matching fluid, and strongly anchored hybrid-aligned nematic liquid crystal (NLC) cell on the ... [Chin. Opt. Lett. 10, 052301- (2012)] Tue, 01 May 2012 00:00:00 EST Exploration of the sum of flexoelectric coefficients of nematic liquid crystals Hongyu Xing Wenjiang Ye Naifu Wu Zhidong Zhang Li Xuan We present a theoretical calculation of the dependence of reflectivity Rpp of the improved fully leaky waveguide geometry, which comprises pyramid, matching fluid, and strongly anchored hybrid-aligned nematic liquid crystal (NLC) cell on the ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-052301 Chinese Optics Letters, Vol. 10, Issue 5, pp. 052301- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-052401 Xiaowei Li, Qiaofeng Tan, Benfeng Bai, Guofan Jin<br/>We present a design for tunable directional beaming through a subwavelength metallic double slit surrounded by dielectric surface-relief gratings. On-axis and off-axis beaming can be switched by controlling the incident angle to asymmetrically ... [Chin. Opt. Lett. 10, 052401- (2012)] Tue, 01 May 2012 00:00:00 EST Tunable directional beaming assisted by asymmetrical SPP excitation in a subwavelength metallic double slit Xiaowei Li Qiaofeng Tan Benfeng Bai Guofan Jin We present a design for tunable directional beaming through a subwavelength metallic double slit surrounded by dielectric surface-relief gratings. On-axis and off-axis beaming can be switched by controlling the incident angle to asymmetrically ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-052401 Chinese Optics Letters, Vol. 10, Issue 5, pp. 052401- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-052601 Wenxue Chen, Shulian Zhang, Xingwu Long<br/>The polarization state is modulated by tilting birefringence component placed in the feedback external cavity. The variation of the polarization state in one period of modulation is found to be similar to sine wave. The periods become increasingly ... [Chin. Opt. Lett. 10, 052601- (2012)] Tue, 01 May 2012 00:00:00 EST Polarization modulation in single-frequency He-Ne laser with an anisotropy feedback cavity Wenxue Chen Shulian Zhang Xingwu Long The polarization state is modulated by tilting birefringence component placed in the feedback external cavity. The variation of the polarization state in one period of modulation is found to be similar to sine wave. The periods become increasingly ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-052601 Chinese Optics Letters, Vol. 10, Issue 5, pp. 052601- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-052701 Shuwei Qiu, Wenge Guo, Mingtao Cao, Tao Liu, Liang Han, Hao Liu, Pei Zhang, Shougang Zhang, Hong Gao, Fuli Li<br/>We present an experimental and theoretical study of self-rotation of optical polarization in a rubidium vapor. The atomic vapor is placed in a magnetic shielding cavity to suppress the Faraday rotation effect. In our experiment, Doppler-free ... [Chin. Opt. Lett. 10, 052701- (2012)] Tue, 01 May 2012 00:00:00 EST Self-rotation of optical polarization in rubidium vapor Shuwei Qiu Wenge Guo Mingtao Cao Tao Liu Liang Han Hao Liu Pei Zhang Shougang Zhang Hong Gao Fuli Li We present an experimental and theoretical study of self-rotation of optical polarization in a rubidium vapor. The atomic vapor is placed in a magnetic shielding cavity to suppress the Faraday rotation effect. In our experiment, Doppler-free ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-052701 Chinese Optics Letters, Vol. 10, Issue 5, pp. 052701- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-052801 Bingjie Wang, Tong Zhao, Huakui Wang<br/>Chaotic laser radar based on correlation detection is a high-resolution measurement tool for remotely monitoring targets or objects. However, its effective range is often limited by the side-lobe noise of correlation trace, which is always ... [Chin. Opt. Lett. 10, 052801- (2012)] Tue, 01 May 2012 00:00:00 EST Improvement of signal-to-noise ratio in chaotic laser radar based on algorithm implementation Bingjie Wang Tong Zhao Huakui Wang Chaotic laser radar based on correlation detection is a high-resolution measurement tool for remotely monitoring targets or objects. However, its effective range is often limited by the side-lobe noise of correlation trace, which is always ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-052801 Chinese Optics Letters, Vol. 10, Issue 5, pp. 052801- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-052802 Nai Lin, Lan Jiang, Sumei Wang, Lei Yuan, Qianghua Chen<br/>An approach to the simultaneous measurement of refractive-index (RI) and temperature changes using optical ring resonators is proposed and theoretically demonstrated. With a liquid-core silica ring resonator as an example, two different-order ... [Chin. Opt. Lett. 10, 052802- (2012)] Tue, 01 May 2012 00:00:00 EST Simultaneous measurement of refractive index and temperature using a microring resonator Nai Lin Lan Jiang Sumei Wang Lei Yuan Qianghua Chen An approach to the simultaneous measurement of refractive-index (RI) and temperature changes using optical ring resonators is proposed and theoretically demonstrated. With a liquid-core silica ring resonator as an example, two different-order ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-052802 Chinese Optics Letters, Vol. 10, Issue 5, pp. 052802- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-052901 Haixia Li, Meina Zhang, Xiaoyi Chen, Chunxiang Liu, Chuanfu Cheng<br/>A practicable experimental method for measuring scattering on rough surfaces is reported. The scattered patterns are captured on a screen composed of two pieces of ground glass and then imaged using a charge-coupled device. The scattered intensity ... [Chin. Opt. Lett. 10, 052901- (2012)] Tue, 01 May 2012 00:00:00 EST Experimental method for the extraction of intensity profiles by imaging the scattered pattern with a charge-coupled device Haixia Li Meina Zhang Xiaoyi Chen Chunxiang Liu Chuanfu Cheng A practicable experimental method for measuring scattering on rough surfaces is reported. The scattered patterns are captured on a screen composed of two pieces of ground glass and then imaged using a charge-coupled device. The scattered intensity ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-052901 Chinese Optics Letters, Vol. 10, Issue 5, pp. 052901- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-053101 Peter Gyula Antal, Robert Szipocs<br/>We show that absorbed and stored electromagnetic energy are proportional to the reflection group delay in highly reflective dispersive dielectric mirrors over the high-reflectivity band. Our theoretical considerations are verified by numerical ... [Chin. Opt. Lett. 10, 053101- (2012)] Tue, 01 May 2012 00:00:00 EST Relationships among group delay, energy storage, and loss in dispersive dielectric mirrors Peter Gyula Antal Robert Szipocs We show that absorbed and stored electromagnetic energy are proportional to the reflection group delay in highly reflective dispersive dielectric mirrors over the high-reflectivity band. Our theoretical considerations are verified by numerical ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-053101 Chinese Optics Letters, Vol. 10, Issue 5, pp. 053101- © 2012 Chinese Optics Letters http://www.opticsinfobase.org/abstract.cfm?URI=col-10-5-053201 Yu Ji, Yan Li, Jian Wu, Xiaobin Hong, Kun Xu, Wei Li, Jintong Lin<br/>This letter proposes and experimentally demonstrates a simple scheme for generating 40-GBaud carrier-suppressed return-to-zero differential quadrature phase shift keying (CSRZ-DQPSK) modulation signals with tunable pulsewidths using two ... [Chin. Opt. Lett. 10, 053201- (2012)] Tue, 01 May 2012 00:00:00 EST Pulsewidth-tunable CSRZ-DQPSK signal generation using DPMZMs Yu Ji Yan Li Jian Wu Xiaobin Hong Kun Xu Wei Li Jintong Lin This letter proposes and experimentally demonstrates a simple scheme for generating 40-GBaud carrier-suppressed return-to-zero differential quadrature phase shift keying (CSRZ-DQPSK) modulation signals with tunable pulsewidths using two ... Optical Society of America 2012-05-01 EN http://www.opticsinfobase.org/abstract.cfm?uri=col-10-5-053201 Chinese Optics Letters, Vol. 10, Issue 5, pp. 053201- © 2012 Chinese Optics Letters