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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Frequency-modulated continuous-wave generation based on an optically injected semiconductor laser with optical

XiaoDong Lin, GuangQiong Xia, Zhou Shang

|January 31, 2019

Summary

This summary is machine-generated.

This study demonstrates a tunable photonic scheme for generating high-quality frequency-modulated continuous-wave (FMCW) signals using optically injected semiconductor lasers. Optical feedback significantly reduces phase noise and enhances signal quality.

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Area of Science:

Photonics
Laser Physics
Optical Communications

Background:

Optically injected semiconductor lasers (SLs) exhibit complex dynamics, including period-one (P1) oscillations.
Frequency-modulated continuous-wave (FMCW) signals are crucial for applications like radar and optical sensing.
Phase noise is a critical parameter affecting the quality and performance of FMCW signals.

Purpose of the Study:

To investigate a photonic scheme for generating tunable, high-quality FMCW signals.
To explore the use of modulated optical injection and optical feedback in semiconductor lasers for FMCW generation.
To analyze the tunability of central frequency and control of sweep range for FMCW signals.

Main Methods:

Utilizing period-one (P1) dynamics of an optically injected semiconductor laser.
Applying modulated optical injection to drive the laser into P1 oscillation.
Introducing an optical feedback loop to reduce microwave phase noise.

Main Results:

Achieved widely tunable central frequency of the FMCW signal from 11.41 to 50.05 GHz.
Demonstrated control over the frequency sweep range by adjusting the modulation index.
Obtained a sweep range of 18.42 GHz and a sweep rate of 1.14 GHz/ns.
Significantly increased FMCW signal frequency comb contrast by 27.15 dB using optical feedback.

Conclusions:

The proposed photonic scheme effectively generates tunable, high-quality FMCW signals.
Optical feedback is a key technique for enhancing FMCW signal quality by reducing phase noise.
The method offers wide tunability and controllable sweep parameters for FMCW generation.