摘要
实验研究了平行光注入下多横模1 550nm垂直腔面发射激光器(1 550nm-VCSEL)输出的非线性动力学特性.对于一个在自由运行时腔内同时存在基横模和一阶横模(高阶模)的1 550nmVCSEL,其两横模的主激射模均为Y偏振模式(Y-LP),当受到偏振方向沿自由运行时主激射模式偏振方向的外部光注入(即平行注入)时,实验研究结果表明:当平行注入光的频率ν_(inj)更临近基横模YLP频率ν_(fy)时(此时频率失谐Δν_f定义为Δν_f=ν_(inj)-ν_(fy)),在注入光强度P_(inj)增加的过程中,基横模Y-LP呈现多种动力学状态,而高阶模Y-LP出现的动力学状态相对较少,且能量逐渐减小.当P_(inj)增加到一定值时,高阶模Y-LP完全被抑制,此时1 550nm-VCSEL处于单模工作状态,即实现了基横模YLP的模式选择.随Δν_f的逐渐增加,实现基横模Y-LP模式选择所需的最小注入光强度P_(inj,min)先减小,达到一个最小值后再逐渐增加;在给定的Δν_f条件下,P_(inj,min)随偏置电流I增加而增大.当平行注入光的频率ν_(inj)更靠近高阶模Y-LP的频率ν_(hy)时(此时频率失谐Δν_h定义为Δν_h=ν_(inj)-ν_(hy)),在P_(inj)增加的过程中,高阶模Y-LP和基横模Y-LP均呈现出多种非线性动力学状态,但实验过程中未观察到基横模Y-LP完全被抑制的现象,即未实现高阶模Y-LP的模式选择.
The nonlinear dynamics of a multi-transverse mode 1550 nm vertical-cavity surfaceemitting laser（1550 nm-VCSEL）under parallel optical injection is experimentally investigated.For a free-running 1550 nm-VCSEL biased at a suitable current,the fundamental and high-order modes can oscillate simultaneously and dominantly operate at the Y Linear Polarizations（Y-LPs）.After introducing a Continuous Wave（CW）injection with the polarized direction along Y-LP of the freerunning 1 550 nm-VCSEL（named as parallel optical injection）,two different scenarios have been investigated experimentally,namely the frequency of injected CW（ν（inj））is close to the fundamental transverse mode frequency（ν（fy））（the frequency detuning is defined as Δνf=ν（inj）-ν（fy））or the high-order transverse mode frequency（ν（fy））（the frequency detuning is defined as Δνh=ν（inj）-ν（hy））.For the first case,the results show that,during the process of continuously increasing injection power（P（inj））,the fundamental mode undergoes diverse dynamical states,but less dynamical states are observed for the high-order mode.With the increase of P（inj）,the output power of the high-order mode is decreased gradually.For a strong enough P（inj）,the high-order mode can be totally suppressed and therefore the laser operates at single transverse mode,i.e.the mode selection for the fundamental mode achieves.With the increase of Δνf,the minimal injection power required for achieving the fundamental transverse mode selection（P（inj,min））decreases firstly,after reaches a minimum,and then increases.The larger the biased current,the larger the value of Pinj,min.For the second case,during the process of increasing Pinj,both high-order mode and fundamental transverse mode undergo multiple dynamical states.However,the phenomena that the fundamental transverse mode is suppressed has not been observed,i.e.the mode selection for high-order mode cannot be realized.
作者
杨文艳
夏光琼
侯玉双
蒋再富
邓涛
吴正茂
YANG Wen-yan;XIA Guang-qiong;HOU Yu-shuang;JIANG Zai-fu;DENG Tao;WU Zheng-mao(School of Physical Science and Technology, Southwest University, Chongqing 400715, China;School of Mathematics and Physics, Chongqing University of Science and Technology, Chongqing 401331, China;School of Science, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia Autonomous Region 014010, China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2018年第7期46-54,共9页
Acta Photonica Sinica
基金
国家自然科学基金(Nos.61475127
61575163
61674123
61775184)资助~~
关键词
垂直腔面发射激光器
多横模
平行光注入
非线性动力学
模式选择
Vertical-Cavity Surface-Emitting Lasers （VCSELs）
Multi-transverse mode
Parallel opticalin
eetion
Nonlinear dynamics
Mode selection
