Tunable multi-wavelength generation of an integrated self-injection locking laser based on the Vernier effect.

IF 3.1 2区 物理与天体物理 Q2 OPTICS
Optics letters Pub Date : 2025-04-01 DOI:10.1364/OL.550686
Dongwei Zhuang, Quanxin Na, Qijie Xie, Li Wang, Baisong Chen, Chunyang Ma, LanXuan Zhang, Lei Wang, Li Qin, Junfeng Song
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引用次数: 0

Abstract

A narrow-linewidth laser based on self-injection locking has found widespread applications, including wavelength division multiplexing, sensing, and LiDAR detection. Although self-injection locking can support multi-wavelength operation, conventional implementations have typically been bulky and constrained by limited wavelength spacing. In this paper, we demonstrate an integrated multi-wavelength self-injection locking (MWSIL) laser capable of generating multiple narrow-linewidth outputs with tunable spacing. Multi-wavelength operation is achieved through the Vernier effect in the injection locking of a single distributed feedback laser (DFB) to a Si3N4-based micro-resonator (MRR). In the experimental demonstration, the wavelength spacing of the laser is tunable from 1.155 nm to 9.24 nm by adjusting the phase of the cavity. The intrinsic linewidths of the multi-wavelength laser are all below 1.6 kHz, with the optimal linewidth at 125 Hz, representing up to a 703-fold improvement compared to the free-running state. Additionally, the laser exhibits mode-hop-free frequency tuning over a range of 2.6 GHz. The MWSIL laser provides an effective on-chip solution for generating a tunable, multi-wavelength optical source with ultra-narrow linewidth.

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来源期刊
Optics letters
Optics letters 物理-光学
CiteScore
6.60
自引率
8.30%
发文量
2275
审稿时长
1.7 months
期刊介绍: The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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