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We report injection‐locking studies on a gain‐guided diode‐laser array using a single‐frequency cw tunable dye laser master oscillator. By injecting a single end element, both the spatial and spectral emission characteristics of the entire ten‐element array could be controlled. The injection‐locked array produced over 100 mW output in a single‐lobed far‐field beam (≪0.5° angular width) with a bandwidth of less than 2 MHz. With 3 mW injection, locking occurred over a number of discrete frequency intervals (∼6 GHz wide). At higher power levels (12 mW), these intervals merged to form one continuous locking range ≫60 GHz wide. Furthermore, by varying the injection frequency, the far‐field emission angle of the array could be continuously scanned over several degrees at a rate of 2.3×10-2 deg/GHz.
Published in:
Applied Physics Letters
(Volume:47
,
Issue:
12
)
Date of Publication: Dec 1985
- Page(s):
- 1244 - 1246
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.96291
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Dec 1985
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