The Theory and Experimental Study on the Long-External Cavity Semiconductor Lasers

2014 ◽  
Vol 571-572 ◽  
pp. 990-993
Author(s):  
Chang Jian Qi ◽  
Tong Gang Zhao
Keyword(s):  
Semiconductor Lasers ◽  
External Cavity ◽  
Single Mode ◽  
Response Characteristic ◽  
Theory Model ◽  
Rate Equations ◽  
External Cavity Laser ◽  
High Frequency Response ◽  
External Cavity Semiconductor Lasers ◽  
Promising Type

Long-External Cavity Laser (L-ECL) is a kind of new and promising type laser because of its dynamic single mode performance. In this paper, firstly, the theory model of L-ECL is discussed; Secondly, the influence of coupling coefficient on the threshold gain of L-ECL is studied based on equivalent external cavity theory; Thirdly, utilizing the theory of equivalent cavity length, combined rate equations, the high frequency response characteristic of L-ECL is analyzed; Lastly, optical spectrums of L-ECL on different grating peak reflectivity are obtained by experiment.

Study of the characteristics of 976 nm Bragg grating external cavity semiconductor lasers

2018 ◽  
Vol 32 (19) ◽  
pp. 1850214 ◽  
Author(s):  
Zhong-Hua Yan ◽  
Shuai Zhou
Keyword(s):  
Semiconductor Lasers ◽  
Modulation Depth ◽  
External Cavity ◽  
Threshold Current ◽  
Theory Model ◽  
Temperature Cycling ◽  
Bragg Grating ◽  
External Cavity Laser ◽  
Mode Suppression ◽  
External Cavity Semiconductor Lasers

976 nm fiber Bragg grating (FBG) external cavity laser is the core component in erbium-doped fiber amplifiers (EDFA). In this paper, the theory model of FBG is modeled by transfer matrix method (TMM). The effects of Bragg grating length and modulation depth on the reflectivity, grating spectrum width and wavelength have been investigated. Then 976 nm laser modules with different grating reflectivity, i.e. 4%, 6%, 8% and 10% have been fabricated. By improving the reflectivity of FBG, the side-mode suppression ratio (SMSR) has been optimized to above 40 dB, and the threshold current decreases. The temperature cycling test indicates that the peak wavelength has a change rate [Formula: see text]0.0095 nm/[Formula: see text]C.

scholarly journals Active Mode-Hop Suppression in Littman-type External Cavity Semiconductor Lasers

1999 ◽  
Vol 119 (7) ◽  
pp. 815-820
Author(s):  
Shigenori Mattori ◽  
Takanori Saitoh ◽  
Shigeru Kinugawa ◽  
Koichiro Miyagi
Keyword(s):  
Semiconductor Lasers ◽  
External Cavity ◽  
Active Mode ◽  
External Cavity Semiconductor Lasers

scholarly journals High spectral purity GaSb-based blazed grating external cavity laser with tunable single-mode operation around 1940nm

2021 ◽  
Vol 29 (21) ◽  
pp. 33864
Author(s):  
Tianfang Wang ◽  
Chengao Yang ◽  
Yi Zhang ◽  
Yihang Chen ◽  
Jinming Shang ◽  
...  
Keyword(s):  
External Cavity ◽  
Single Mode ◽  
Spectral Purity ◽  
External Cavity Laser ◽  
Blazed Grating ◽  
Single Mode Operation ◽  
Mode Operation ◽  
Cavity Laser

Characteristics of High Power Volume-Bragg-Grating External Cavity Semiconductor Lasers

2008 ◽  
Vol 35 (4) ◽  
pp. 501-504
Author(s):  
薄报学 Bo Baoxue ◽  
高欣 Gao Xin ◽  
乔忠良 Qiao Zhongliang ◽  
王玉霞 Wang Yuxia ◽  
卢鹏 Lu Peng ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
High Power ◽  
External Cavity ◽  
Bragg Grating ◽  
Volume Bragg Grating ◽  
External Cavity Semiconductor Lasers

Low-Noise External Cavity Semiconductor Lasers Based on Polarization-Maintaining Fiber Bragg Gratings

2018 ◽  
Vol 45 (6) ◽  
pp. 0601004
Author(s):  
孙广伟 Sun Guangwei ◽  
魏芳 Wei Fang ◽  
张丽 Zhang Li ◽  
陈迪俊 Chen Dijun ◽  
张茜 Zhang Xi ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
External Cavity ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Low Noise ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
External Cavity Semiconductor Lasers
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