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Updated: May 4, 2026

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

Resonator-enhanced distributed Bragg reflector lasers.

Di Yu¹, Zhaoting Geng¹, Yuhao Huang¹

¹Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China.

Light, Science & Applications

|March 2, 2026

Summary

This summary is machine-generated.

We developed new resonator-enhanced distributed Bragg reflector (RE-DBR) lasers for integrated photonics. These lasers offer ultra-narrow linewidths and wide tunability, overcoming previous limitations in high-coherence optical sources.

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Laser Physics

Background:

Narrow-linewidth lasers are crucial for optical communications, metrology, and microwave photonics.
Integrated laser platforms face trade-offs between linewidth, tunability, and robustness.
Existing solutions often sacrifice performance in one area to achieve gains in others.

Purpose of the Study:

To introduce and demonstrate a novel class of integrated lasers overcoming traditional limitations.
To achieve ultra-narrow linewidths, wide mode-hop-free tunability, and turnkey operation simultaneously.
To provide a cost-effective, high-performance alternative to bulky benchtop lasers.

Main Methods:

Development of a resonator-enhanced distributed Bragg reflector (RE-DBR) laser architecture.
Incorporation of a grating-assisted ring resonator as a compact external cavity for feedback.
Experimental demonstration of the RE-DBR laser's performance characteristics.

Main Results:

Demonstrated a RE-DBR laser with a 24 Hz Lorentzian linewidth.
Achieved a 34 GHz mode-hop-free tuning range.
Confirmed universal turnkey operability with a sub-4 mm² footprint.

Conclusions:

RE-DBR lasers circumvent the linewidth-tunability trade-off inherent in conventional DBR lasers.
These lasers maintain high optical coherence and stable operation across a broad tuning range.
RE-DBR lasers represent a significant advancement for integrated, high-coherence optical sources.