Laser linewidth characterization via self-homodyne measurement under nearly-coherent conditions

被引：5

作者：

Attia, Ido ^{[1
]}

Wohlgemuth, Eyal ^{[1
]}

Balciano, Ohad ^{[1
]}

Cohen, Roi Jacob ^{[1
]}

Yoffe, Yaron ^{[1
]}

Sadot, Dan ^{[1
]}

机构：

[1] Ben Gurion Univ Negev, Dept Elect & Comp Engn, Beer Sheva, Israel

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 09期

关键词：

NOISE; INTERFEROMETER;

D O I：

10.1364/OE.451758

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work we propose a novel and efficient characterization scheme for a narrow linewidth laser using a nearly-coherent delayed sel f-homodyne (NC-DSH) technique. The modulated signal of an analog coherent optics (ACO) transceiver, configured in optical loop-back, and the local oscillator (LO) are mixed after a very short optical path difference (OPD), corresponding to an interferometer operating in its nearly-coherent regime. The phase noise is extracted from a digital signal processing algorithm of carrier phase estimation (CPE), while data is transmitted. The interferometric pattern's E-field power spectral density (PSD) enables the extraction of the OPD and the linewidth of the transceiver's laser source in high accuracy. The proposed technique is demonstrated using a commercial integrated coherent transmitter and receiver optical sub-assembly (IC-TROSA). (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：14492 / 14504

页数：13