Self-adaptive method for performance enhancement of sweep-velocity-locked lasers

Zheyi Yao; Gerald Hefferman; Kan Ren; Tao Wei

doi:10.1117/1.OE.58.1.016112

28 January 2019 Self-adaptive method for performance enhancement of sweep-velocity-locked lasers

Zheyi Yao, Gerald Hefferman, Kan Ren, Tao Wei

Author Affiliations +

Optical Engineering, Vol. 58, Issue 1, 016112 (January 2019). https://doi.org/10.1117/1.OE.58.1.016112

Abstract

Optical frequency-domain reflectometry and frequency-modulated continuous wave (FMCW)-based sensing technologies, such as LiDAR and distributed fiber sensors, fundamentally rely on the performance of frequency-swept laser sources. Specifically, frequency-sweep linearity, which determines the level of measurement distortion, is of paramount importance. Sweep-velocity-locked semiconductor lasers (SVLLs) controlled via phase-locked loops (PLLs) have been studied for many FMCW applications owing to its simplicity, low cost, and low power consumption. We demonstrate an alternative, self-adaptive laser control system that generates an optimized predistortion curve through PLL iterations. The described self-adaptive algorithm was successfully implemented in a digital circuit. The results show that the phase error of the SVLL improved by around 1 order of magnitude relative to the one without using this method, demonstrating that this self-adaptive algorithm is a viable method of linearizing the output of frequency-swept laser sources.

Citation Download Citation

Zheyi Yao, Gerald Hefferman, Kan Ren, and Tao Wei "Self-adaptive method for performance enhancement of sweep-velocity-locked lasers," Optical Engineering 58(1), 016112 (28 January 2019). https://doi.org/10.1117/1.OE.58.1.016112

Received: 17 November 2018; Accepted: 3 January 2019; Published: 28 January 2019

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available