Study on ultra-fast nonlinear optical functional devices

超快非线性光学功能器件研究

基本信息

批准号：
07555010
负责人：
KAWAGUCHI Hitoshi
金额：
$ 6.21万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555010/
关键词：
Semiconductor laser Semiconductor optical amplifier Four-wave mixing Mode-locking Generation of ultrashort optical pulse Wavelength conversion Optical sampling Compression of optical pulse 偏波面自己変調

项目摘要

We have investigated mainly the following four topics to create new nonlinear optical functional devices.(1) Highly nondegenerate four-wave mixing in a semiconductor optical amplidierWe have demonstrated the highly nonfegenerate four-wave mixing (FWM) among subpicosecond optical pulses in a 1.3-mum multiple-quantum-well (MQW) semiconductor optical amplifier (SOA). We could directly measure the FWM signal in the output spectrum by current pulse pumping of the device. We achieved a high conversion efficiency of over 10% at a frequency conversion range of less than 1 TH_z.(2) Optical sampling using FWM in a SOAWe have demonstrated ultra-fast optical sampling using the FWM process in an SOA.A signal light and a sampling light are injected into an SOA as a probe light and a pump light, respectively. We can measure the sampling waveform as the envelope of the FWM signal. The result shows good linear relation between the FWM intensity and input probe energy for an input energy of 1 fJ to 0.1 pJ.(3) Suppression of multiple pulse formation in mode-locked laser diodesWe have proposed a new method for obtaining short optical pulses without trailing pulses from an actively mode-locked laser diode. A part of the output is reflected back into the laser diode with an orthogonal polarization. The trailing pulses caused both by the excess gain and the residual reflection at the laser diode facet are drastically suppressed. We experimentally demonstrated the reduction of the trailing pulses caused by the excess gain using 1.55mum In G_aA_sP laser diodes.(4) Sub-picosecond optical pulse generation from a mode-locked laser diodeWe have generated short optical pulses (1-2ps) by hibrid mode-locking of a laser diode with a fast saturable absorber. The wavelength could be changed in the range between 1.49mum and 1.54mum. The pulse width was shortened to 800fs using the fiber compression.

我们已经研究了以下四个主题，以创建新的非线性光学功能设备。（1）在半导体光学扩增器中高度非排定四波混合我们在1.3-mum poled-quier-quier-quier-emploine semaric（mqiifif semancif semain empier emaric necif sepical semain emain emain semain sepical sepical pulse s poseape sepif）semaine unifice pulse promainsement（FWM）表现出了高度非非网状四波混合（FWM）。我们可以通过设备的电流脉冲泵送在输出频谱中直接测量FWM信号。我们在少于1 Th_z的频率转换范围内实现了高度超过10％的效率。（2）使用SOAWE中的FWM进行光学采样表明，使用SOA中的FWM过程分别将超快速的光学抽样注入了信号光中，并将采样光与SOA注入SOA作为探针和泵送光。我们可以测量采样波形作为FWM信号的包膜。结果表明，FWM强度和输入探针能量之间的良好线性关系对于1 FJ至0.1 PJ的输入能量。（3）在模式锁定的激光二极管中抑制多重脉冲形成，我们提出了一种新方法，用于获得短的光学脉冲，而无需从活跃的模式锁定的激光激光型脉冲中拖延脉冲。输出的一部分被反射回具有正交极化的激光二极管。激光二极管方面的过量增益和残余反射引起的尾随脉冲被大大抑制。我们在实验上证明了通过使用1.55MUM在G_AA_SP激光二极管中的超额增益引起的尾声脉冲的减少。（4）通过Hibrid Mode-lastober与Laser a laser a laser a a lase diode产生了短的光学脉冲（1-2PS），从模式锁定激光二极管从模式的激光二极管产生了子脉冲脉冲产生。波长可以在1.49mum和1.54mum之间更改。使用纤维压缩将脉冲宽度缩短为800F。