Coherent combination of microsecond-pulse tapered amplifiers for a water-vapor differential absorption lidar

Qin Liu; Clément Marque; Sylvie Janicot; Patrick Georges; Gaëlle Lucas-Leclin

doi:10.1117/12.2647246

15 March 2023 Coherent combination of microsecond-pulse tapered amplifiers for a water-vapor differential absorption lidar

Qin Liu, Clément Marque, Sylvie Janicot, Patrick Georges, Gaëlle Lucas-Leclin

Author Affiliations +

Proceedings Volume 12440, Novel In-Plane Semiconductor Lasers XXII; 124400L (2023) https://doi.org/10.1117/12.2647246
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Remote sensing techniques are critical in atmospheric research, such as the monitoring of the low tropospheric temperature and the water vapor distribution. Lidar is one type of remote sensing technique that can deliver an atmospheric measurement with high spatial and temporal resolutions¹. In this paper, we describe a diode-laser-based laser source at 828 nm in a master oscillator power amplifier (MOPA) architecture designed to be compatible with a water-vapor differential absorption lidar (DIAL). Two tapered amplifiers with a pulse duration of 1 μs and a repetition rate of 10 kHz are injected by a single-frequency DBR seed laser diode and coherently combined. The performance of the seed DBR laser diode and the tapered amplifiers are characterized. The phase dynamics during the pulse are analyzed, and we demonstrate that they do not significantly reduce the combining efficiency. The combined power is stabilized by a hill-climbing algorithm which actively corrects the low-frequency environmental noise. The average combined pulse energy is highly stable with relative fluctuations σ_on = 0.4%. The combined pulse energy reaches 10.3 μJ at the maximal operation current of 8.1 A with a combining efficiency above 82% ± 5%. This work demonstrates the coherent beam combination of micropulse tapered amplifiers and the interests of these techniques in lidar applications.

Conference Presentation

Citation Download Citation

Qin Liu, Clément Marque, Sylvie Janicot, Patrick Georges, and Gaëlle Lucas-Leclin "Coherent combination of microsecond-pulse tapered amplifiers for a water-vapor differential absorption lidar", Proc. SPIE 12440, Novel In-Plane Semiconductor Lasers XXII, 124400L (15 March 2023); https://doi.org/10.1117/12.2647246

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