Open AccessMicroresonator stabilized 2 μm distributed-feedback GaSb-based diode laser
Author(s) -
Elijah Dale,
Mahmood Bagheri,
Andrey B. Matsko,
Clifford Frez,
Wei Liang,
Siamak Forouhar,
Lute Maleki
Publication year - 2016
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.41.005559
Subject(s) - optics , diode , materials science , laser , optoelectronics , semiconductor laser theory , distributed feedback laser , physics
We report on the stabilization of a high-power distributed feedback (DFB) semiconductor laser operating at 2.05 μm wavelength, using a crystalline whispering gallery mode microresonator. The laser's frequency noise is measured to be below 100 Hz/Hz 1/2 at Fourier frequencies ranging from 10 Hz to 1 MHz. The instantaneous linewidth of the laser is improved by four orders of magnitude compared with the free-running DFB laser, and is measured to be 15 Hz at 0.1 ms measurement time. The integral linewidth approaches 100 Hz. The stabilized DFB laser is integrated with a polarization maintaining output fiber and an integrated optical isolator.