A Tunable Single-Mode All-Optical Microwave Oscillator by Using Period-One Oscillation in DFB-LD

A tunable all-optical microwave oscillator, which has no electrical microwave devices as well as photoelectric conversion and electro-optic modulation, is proposed and experimentally demonstrated. In this scheme, a distributed-feedback laser diode is utilized to be a light source and create a seed m...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 31; no. 6; pp. 491 - 494
Main Authors Luo, Hao, Jiang, Yang, Dong, Ruyang, Zi, Yuejiao, Zhang, Xiaoyu, Tian, Jing
Format Journal Article
LanguageEnglish
Published New York IEEE 15.03.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
All-optical microwave oscillator
Distributed feedback lasers
Feedback loops
injection-locked
Microwave amplifiers
Microwave filters
Microwave oscillators
Microwave photonics
Modal choice
Modulation
Optical attenuators
Optical feedback
Photoelectricity
Semiconductor lasers
Semiconductor optical amplifiers
Short fibers
Signal quality
Single sideband transmission
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Summary:A tunable all-optical microwave oscillator, which has no electrical microwave devices as well as photoelectric conversion and electro-optic modulation, is proposed and experimentally demonstrated. In this scheme, a distributed-feedback laser diode is utilized to be a light source and create a seed microwave signal from the period-one (P1) oscillation by a self-delayed optical feedback injection. A semiconductor optical amplifier-based all-optical feedback loop is introduced to perform optical-optical feedback modulation and mode selection. Meanwhile, a short fiber loop is coupled to further suppress the residual side modes. In the experiment, single-mode microwave photonic signals with good quality are obtained, whose frequencies can be tuned from 6.10 to 15.59 GHz by adjusting the optical feedback ratio. The measured single-sideband phase noise is -89 dBc/Hz at 10-kHz offset from a carrier of 10.98 GHz.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2019.2900764