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光学
真延时
半导体激光器理论
激光器
光电子学
光子学
带宽(计算)
群时延和相位时延
材料科学
光功率
物理
电信
计算机科学
相控阵
量子力学
天线(收音机)
作者
Kun Lin Hsieh,Sheng-Kwang Hwang,Chin‐Ping Yang
出处
期刊:Optics Letters
[The Optical Society]
日期:2017-08-18
卷期号:42 (17): 3307-3307
被引量:20
摘要
This study numerically and experimentally investigates a photonic approach for microwave time delay, which takes advantage of the redshift of the laser cavity resonance induced by external optical injection in a semiconductor laser. The strong enhancement around the redshifted cavity resonance not only amplifies the power, but also shifts the phase of the microwave signals carried by the optical injection. Such a microwave phase shift is approximately linear over a few gigahertz, leading to a constant microwave time delay over the frequency range. A different time delay can be achieved by simply adjusting the injection power or frequency. For the microwave frequencies up to 40 GHz investigated in this Letter, a continuously tunable range of more than 80 ps in time delay is achieved over an instantaneous bandwidth of approximately 7 GHz. The quality of the data carried by the microwave signals is mostly preserved after time delay. Thus, a bit-error ratio down to 10−9 at 2.5 Gb/s is achieved with a possible detection sensitivity improvement of 5 dB.
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