Development of shot Optical pulse generators using semiconductor lasers

使用半导体激光器的发射光脉冲发生器的开发

基本信息

批准号：
04555010
负责人：
KAWAGUCHI Hitoshi
金额：
$ 12.22万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555010/
关键词：
Semiconductor laser Mode-locking Coherent photon seeding Optical short-pulse generation Optical fiber cavity Fiber laser Compression of optical pulse Polarization self-modulation コヒーレントパルスシーディング

项目摘要

We have investigated mainly the following four topics to develope short optical pulse generators.(1) Coherent photon seeding of acitively mode locked laser diodesWe have applied the coherent photon seeding technique to actively mode locked laser diodes for the first time and successfully achieved a single longitudinal laser diode mode operation.We also proposed a modified fiber cavity for obtaining single longitudinal laser diode mode operation in active mode locking.It has been shown that if a fusion spliced plane is incorporated inside the single mode fiber cavity, the reflection from it can provide the feedback necessary for coherent photon seeding(2) Suppression of multiple pulse formation by gain quenchingWe have proposed a new method for obtaining high-power short optical pulses without trailing pulses from an actively mode-locked laser diode. To quench the residual optical gain, a part of the output is reflected back into the laser diode with the orthogonal polarization and the appropriate time delay. A numerical analysis using traveling-wave rate equations shows that trailing pulses caused by both the excess gain and the residual reflection at the laser diode facet are drastically suppressed.(3) Optical pulse generation by polarization self-switching in laser diodesOptical pulses with a continuously tunable repetition rate has been generated through a polarization self-switching effect in an external cavity laser diode modified by the insertion of a slightly tilted quater-wave retardation plate.(4) Mode-locking of an erbium doped fiber laser with an laser diode absorber amplifierWe have obtained self-Q-switching and self-mode-locking in an erbium doped fiber laser which has an InGaAsP LD as a saturable absorber.Active mode-locking using an LD modulator has been also achieved.

我们主要研究了以下四个课题来开发短光脉冲发生器。（1）主动锁模激光二极管的相干光子播种技术我们首次将相干光子播种技术应用于主动锁模激光二极管，并成功实现了单纵激光二极管模式操作。我们还提出了一种改进的光纤腔，用于在主动锁模中获得单纵向激光二极管模式操作。已经表明，如果在单模光纤腔内合并熔接平面，则来自它的反射可以提供这相干光子播种所必需的反馈（2）通过增益猝灭抑制多脉冲形成我们提出了一种从主动锁模激光二极管获得高功率短光脉冲而无需拖尾脉冲的新方法。为了消除残余光学增益，部分输出以正交偏振和适当的时间延迟反射回激光二极管。使用行波速率方程的数值分析表明，由激光二极管端面的过量增益和残余反射引起的拖尾脉冲被极大地抑制。(3)通过激光二极管中的偏振自切换产生光脉冲连续光脉冲通过插入稍微倾斜的四波延迟板修改外腔激光二极管中的偏振自切换效应，产生了可调谐重复率。(4) 掺铒光纤的锁模具有激光二极管吸收放大器的激光器我们在掺铒光纤激光器中实现了自调Q和自锁模，该激光器以InGaAsP LD作为可饱和吸收器。还实现了使用LD调制器的主动锁模。