Optical feedback stabilization of the intensity oscillation in ultrahigh-frequency passively mode-locked monolithic quantum-well lasers

Journal Article · Mon Nov 01 04:00:00 EST 1993 · IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/68.250039· OSTI ID:5435677

Solgaard, O; Lau, K Y ^[1]

---

1. Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Science

The effect of optical feedback on the stability of the mode-locking frequency of monolithic, passively mode-locked semiconductor lasers at [approximately]50 GHz is investigated. Optical feedback leads to linewidth narrowing, frequency pulling, and multiple modes of the intensity modulation in mode-locked lasers, reminiscent of similar effects on the optical frequency in conventional continuous wave (CW) lasers. The narrowest observed line had a full-width-at-half-maximum (FWHM) of 56 kHz, which represents close to two orders of magnitude reduction of the linewidth compared to the situation without feedback. The effects of the optical feedback vary periodically as the length of the feedback delay is varied, with a periodicity that roughly matches the mode locking wavelength. This wavelength is on the order of millimeters, which makes the mechanical stability of the optical feedback loop relatively uncritical.

• OSTI ID: 5435677
• Journal Information: IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (United States) Vol. 5:11; ISSN 1041-1135; ISSN IPTLEL
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
DATA
EXPERIMENTAL DATA
INFORMATION
LASERS
MODE LOCKING
NOISE
NUMERICAL DATA
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SOLID STATE LASERS
STABILIZATION