Single-frequency, single-spatial-mode ROW-DFB diode laser arrays

Single-frequency, stable single-spatial-mode operation from large-aperture (40-60 μm) index-guided devices is demonstrated from resonant antiguided phase-locked InGaAs-InGaP-GaAs diode-laser arrays incorporating 2nd-order distributed-feedback gratings (i.e., ROW-DFB arrays). The devices operate in a...

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Bibliographic Details
Published in:IEEE photonics technology letters 1996-02, Vol.8 (2), p.182-184
Main Authors: Nesnidal, M.P., Mawst, L.J., Bhattacharya, A., Botez, D., DiMarco, L., Connolly, J.C., Abeles, J.H.
Format: Article
Language:English
Subjects:
Apertures
Diffraction
Diode lasers
Frequency
Gratings
Laser modes
Optical arrays
Phased arrays
Power generation
Semiconductor laser arrays
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Summary:Single-frequency, stable single-spatial-mode operation from large-aperture (40-60 μm) index-guided devices is demonstrated from resonant antiguided phase-locked InGaAs-InGaP-GaAs diode-laser arrays incorporating 2nd-order distributed-feedback gratings (i.e., ROW-DFB arrays). The devices operate in a single-spatial-mode up to 3.6×threshold, and truly single-mode (i.e., single-spatial-mode and single-frequency) up to 2×threshold, For 40 (60)-μm-aperture 10-element arrays, the beam pattern is in-phase and diffraction-limited with 70% (75%) of the power residing in the main lobe. Single-frequency operation is obtained from 9640-9652 /spl Aring/, over a temperature range of approximately 20/spl deg/C, side-mode suppression ratios /spl ges/20 dB are recorded up to 2×threshold.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.484234