Broadly wavelength-tunable external cavity lasers with extremely low power variation over tuning range

Author

Oh Kee Kwon ; Kang Ho Kim ; Eun Deok Sim ; Jong Hoi Kim ; Hyun Soo Kim ; Kwang Ryong Oh

Author_Institution

Opt. Commun. Devices Dept., Electron. & Telecommun. Res. Inst., Daejeon, South Korea

Volume

17

Issue

3

fYear

2005

fDate

3/1/2005 12:00:00 AM

Firstpage

537

Lastpage

539

Abstract

Tunable external-cavity lasers with low power variation over a broad tuning range are demonstrated using asymmetric multiple quantum-wells with a wide and flat gain. For a 2.8-μm-wide ridge waveguide laser of cavity length 380 μm, when used in a grating external cavity and with an antireflection coating on one facet of laser diode chip, the power variation of less than -1 dB is obtained over a range of 80 nm. This extremely low power variation is a direct result of the spectrally flat gain.

Keywords

antireflection coatings; diffraction gratings; laser cavity resonators; laser tuning; quantum well lasers; waveguide lasers; 2.8 mum; 380 mum; antireflection coating; asymmetric multiple quantum wells; broad tuning range; broad wavelength laser; external cavity laser; grating external cavity; laser diode chip; low power variation; ridge waveguide laser; spectrally flat gain; tunable laser; Gratings; Laser tuning; Optical tuning; Power generation; Power lasers; Quantum well lasers; Semiconductor lasers; Threshold current; Tunable circuits and devices; Waveguide lasers; Broad-band tunablility; external cavity; laser tuning; quantum-well (QW) lasers; semiconductor lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2004.842363

Filename

1396006