Single Mode Wavelength Control Of Modulated AIGaAs Lasers With External And Internal Etalon Feedback

William L. Maynard

doi:10.1117/12.951281

11 July 1989 Single Mode Wavelength Control Of Modulated AIGaAs Lasers With External And Internal Etalon Feedback

William L. Maynard

Proceedings Volume 1044, Optomechanical Design of Laser Transmitters and Receivers; (1989) https://doi.org/10.1117/12.951281
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Control of the longitudinal mode of a laser diode is necessary in any wavelength dependent beam combining system. External and internal etalons can provide periodic optical feedback to a laser diode which modifies the laser diode gain curve, resulting in improved control of the lasing mode. We have obtained single mode lasing without mode hops for VSIS and CSP laser diodes with an external etalon attached to the laser's front facet for up to an 8°C range CW and a 4°C range pulsed, with .07 nm/°C tuning. Our tests of thin tapered-thickness (TT I) laser diodes show CW and pulsed single mode lasing over 10°C and 2°C ranges, respectively, with .08 nm/°C tuning. An analysis of the TTT structure reveals the equivalent of an internal etalon. The time resolved pulsed behavior for both types of lasers show single mode lasing within the proper temperature ranges with minor modes present only early in the optical pulse, if at all. The external etalon produces noticeable interference fringes in the farfield pattern, while those of the TTT lasers are smooth. Ongoing CW lifctest results indicate stability to within one longitudinal mode after a few hundred hours of operation, along with at least several thousand hours lifetime.

Citation Download Citation

William L. Maynard "Single Mode Wavelength Control Of Modulated AIGaAs Lasers With External And Internal Etalon Feedback", Proc. SPIE 1044, Optomechanical Design of Laser Transmitters and Receivers, (11 July 1989); https://doi.org/10.1117/12.951281

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