Stretched-Pulse Mode-Locked Laser Using Post-Cavity Stretching for Ultrahigh-Speed OCT

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-11-27 DOI:10.1109/LPT.2024.3508541

Jongyoon Joo;Seungwan Cho;Benjamin J. Vakoc;Wang-Yuhl Oh

引用次数: 0

Abstract

We demonstrate a chirped fiber Bragg grating (CFBG) based stretched-pulse mode-locked (SPML) wavelength-swept laser that uses both intra-cavity and post-cavity stretching. The SPML laser with complementary post-cavity stretching offers versatility in OCT imaging speed and eliminates the need for optical buffering. Using an SPML laser with a 5-m intra-cavity CFBG and a 5-m post-cavity CFBG, providing a wavelength sweep rate of 1075 nm/

$\mu $

s, we achieved OCT imaging with a sensitivity of 97.4 dB and a single-sided 6-dB coherence length of 5.6 mm. This demonstrated more than two-fold increase in coherence length with a slight sensitivity drop of 0.6 dB compared to an SPML laser with the same wavelength sweep rate using intra-cavity stretching only. The CFBG-SPML laser with post-cavity stretching offers a compelling option for OCT systems, particularly when long imaging range is required.

查看原文本刊更多论文

超高速OCT的腔后拉伸拉伸脉冲锁模激光器

我们演示了一种基于啁啾光纤布拉格光栅（CFBG）的拉伸脉冲锁模（SPML）波长扫描激光器，该激光器同时使用腔内和腔后拉伸。具有互补腔后拉伸的SPML激光器提供了OCT成像速度的多功能性，并消除了光学缓冲的需要。使用具有5 m腔内CFBG和5 m腔后CFBG的SPML激光器，提供1075 nm/ $\mu $ s的波长扫描速率，我们实现了灵敏度为97.4 dB和单侧6 dB相干长度为5.6 mm的OCT成像。结果表明，与仅使用腔内拉伸的具有相同波长扫描速率的SPML激光器相比，相干长度增加了两倍以上，灵敏度下降了0.6 dB。具有腔后拉伸的CFBG-SPML激光器为OCT系统提供了一个引人注目的选择，特别是当需要长成像范围时。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.