Spectral linewidth narrowing of broad-area blue diode bar in V-shape external Talbot cavity

被引：1
|
作者：
Nyuaupane, Parashu R. [1 ]
Likamwa, Patrick L. [1 ,2 ]
Braiman, Yehuda [1 ,2 ]
机构：
[1] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA
[2] Univ Cent Florida, Dept Elect & Comp Engn, Orlando, FL 32816 USA
来源：
OPTICS LETTERS | 2022年 / 47卷 / 11期
关键词：
HIGH-POWER; LASER-DIODES; INJECTION LOCKING; BAND EMISSION; ARRAY; NM; LIGHT; GENERATION; OPERATION; OUTPUT;
D O I：
10.1364/OL.456782
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A 1-D linear array of 23 high-power broad-area laser diode (BALD) beams in the blue spectral region (447 nm) is combined employing a V-shape external Talbot cavity in Littrow configuration. A surface grating provides optical feedback via self-imaged diffractive coupling to the diode bar and induces all the emitters to lase at a common central wavelength. The external cavity reduces the spectral linewidth of the free-running laser diode bar from several nm to 20-50 pm (FWHM) with the power level of 11.8 W. The narrow spectrum of the external cavity stabilized laser can be tuned in the range of 3-4 nm by adjusting the tilt angle of the grating while the laser diode bar is operated in constant current mode at a temperature of 20 degrees C. (C) 2022 Optica Publishing Group
引用
收藏
页码：2802 / 2805
页数：4
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