Y-branch coupled DFB-lasers based on high-order Bragg gratings for wavelength stabilization

Y-branch coupled distributed-feedback lasers with 40th- and 80th-order surface Bragg gratings have been fabricated using a process based on I-line wafer stepper lithography. The devices allow dual wavelength lasing at around 975 nm. Wavelength spacing of 0.5 and 4 nm have been achieved by using grat...

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Bibliographic Details
Published in:Semiconductor science and technology 2013-03, Vol.28 (3), p.35009
Main Authors: Fricke, J, Klehr, A, Brox, O, John, W, Ginolas, A, Ressel, P, Weixelbaum, L, Erbert, G
Format: Article
Language:English
Subjects:
Bragg grating
DFB-laser
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser optical systems: design and operation
Optics
Physics
Resonators, cavities, amplifiers, arrays, and rings
semiconductor laser diode
surface grating
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Summary:Y-branch coupled distributed-feedback lasers with 40th- and 80th-order surface Bragg gratings have been fabricated using a process based on I-line wafer stepper lithography. The devices allow dual wavelength lasing at around 975 nm. Wavelength spacing of 0.5 and 4 nm have been achieved by using grating period differences of 2.9 and 47.6 nm for the 40th- and 80th-order gratings, respectively. The manufactured devices with internal wavelength stabilization work as master oscillator power amplifiers with two separate and one common amplifier sections. We present optical output characteristics of the devices under continuous wave operation.
ISSN:0268-1242
1361-6641
DOI:10.1088/0268-1242/28/3/035009