Study of ultrafast optical buffer memory using long wavelength VCSELs

使用长波长 VCSEL 的超快光学缓冲存储器的研究

基本信息

批准号：
16360025
负责人：
KAWAGUCHI Hitoshi
金额：
$ 9.73万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360025/
关键词：
vertical-cavity surface-emitting laser optical bistability polarization switching all-optical buffer memory shift register optical packet switching photonic network lone-waveleneth VCSEL

项目摘要

We investigated mainly the following four topics to create the all-optical buffer memory working in the long-wavelength region.1. We have prepared VCSELs with a square mesa-structure. The polarization bistable switching was obtained by injection of optical pulses. We demonstrated the record low switching energy of 0.2 fJ and 0.3 fJ for the set and reset optical pulses and the record high switching frequency of 10 GHz in the flip-flop operation.2. We proposed a novel 3R regenerator based on the polarization bistability in VCSELs. The VCSEL output signal through a polarizer becomes the regenerated signal which has the same bit pattern as the data signal. The rise and the fall timings of the VCSEL output are determined by the timings of the set pulse and the reset pulse. Thus, the timing jitter of the data signal is reduced. In our experiment, the peak-to-peak timing jitter of 2 ns was reduced to 0.7 ns.3. We have proposed the optical buffer memory using a two-dimensional array of the polarization bistable VCSELs. First, the polarization of the VCSELs are reset by an optical reset pulse. Optical signals are converted to spatially parallel signals and injected into the VCSELs together with optical set pulses. Only when the optical signals and the optical set pulses are simultaneously injected into the VCSELs, the VCSELs change their polarization. Therefore, the VCSELs emit the outputs with the polarization which depend on '0' and '1' of the input signal. The output signal pulses are created from the CW 0° output of the VCSELs and are converted to an ultrafast optical signal. We have experimentally demonstrated 1-bit optical buffering.4. We have made a 1.55 μm VCSEL structure have obtained laser oscillation by optical pumping. This result makes the optical buffer memory possible in the long wavelength region.

我们主要研究了以下四个主题，以创建在长波长区域中起作用的全光缓冲存储器1。我们已经准备了具有方形台面结构的VCSEL。通过注射光脉冲可获得极化双向切换。我们证明了该集合和重置光脉冲的记录低开关能量为0.2 fj和0.3 fj，并且在触发器操作中的记录高开关频率为10 GHz。2。我们根据VCSELS的极化双重性提出了一种新型的3R再生器。通过偏振器的VCSEL输出信号变成了与数据信号相同的位模式的再生信号。 VCSEL输出的上升时间和秋季时间由设定脉冲和复位脉冲的时机确定。这是数据信号的定时抖动。在我们的实验中，2 ns的峰峰时间抖动降低至0.7 ns.3。我们已经使用极化双向VCSEL的二维阵列提出了光缓冲存储器。首先，VCSEL的极化是通过光学复位脉冲重置的。光信号转换为空间并行信号，并与光学脉冲一起注入VCSEL。只有将光学信号和光学脉冲简单地注入VCSEL时，VCSEL才会改变其极化。因此，VCSEL以偏振散发输出，取决于输入信号的“ 0”和“ 1”。输出信号脉冲是由VCSEL的CW 0°输出产生的，并转换为超快光信号。我们在实验上证明了1位光缓冲4。我们制作了1.55μm的VCSEL结构，通过光泵泵获得了激光振荡。该结果使长波长区域中的光缓冲区存储器成为可能。