IRUS Total

Tunable, dual wavelength and self-Q-switched Alexandrite laser using crystal birefringence control

File Description SizeFormat 
oe-27-13-17507.pdfPublished version3.26 MBAdobe PDFView/Open
Title: Tunable, dual wavelength and self-Q-switched Alexandrite laser using crystal birefringence control
Authors: Tawy, G
Damzen, M
Item Type: Journal Article
Abstract: We present a red-diode-pumped Alexandrite laser with continuous wavelength tunability, dual wavelength and self-Q-switching in an ultra-compact resonator containing only the gain medium. Wavelength tuning is obtained by varying the geometrical path length and birefringence by tilting a Brewster-cut Alexandrite crystal. Two crystals from independent suppliers are used to demonstrate and compare the performance. Wavelength tuning between 750 and 764 nm is demonstrated in the first crystal and between 747 and 768 nm in the second crystal. Stable dual wavelength operation is also obtained in both crystals with wavelength separation determined by the crystal free spectral range. Temperature tuning was also demonstrated to provide finer wavelength tuning at a rate of −0.07 nm K −1. Over a narrow tuning range, stable self-Q-switching is observed with a pulse duration of 660 ns at 135 kHz, which we believe is the highest Q-switched pulse rate in Alexandrite to date. Theoretical modelling is performed showing good agreement with the wavelength tuning and dual wavelength results.
Issue Date: 24-Jun-2019
Date of Acceptance: 16-May-2019
URI: http://hdl.handle.net/10044/1/70594
DOI: https://dx.doi.org/10.1364/OE.27.017507
ISSN: 1094-4087
Publisher: Optical Society of America (OSA)
Start Page: 17507
End Page: 17520
Journal / Book Title: Optics Express
Volume: 27
Issue: 13
Copyright Statement: © 2019 The Author(s). Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Sponsor/Funder: European Space Agency / Estec
Innovate UK
European Space Agency
Funder's Grant Number: 4000115840/15/NL/RA/zk
Keywords: Optics
0205 Optical Physics
1005 Communications Technologies
0906 Electrical and Electronic Engineering
Publication Status: Published
Online Publication Date: 2019-06-10
Appears in Collections:Physics