A compact digitally tunable seven-channel ring laser

A seven-channel ring laser was realized by monolithic integration of a compact 4/spl times/4 PHASAR (de)multiplexer with four amplifiers in InP. The PHASAR was fabricated using a double-etch technique, enabling a total size of the ring laser of only 1/spl times/1.5 mm/sup 2/. Light was coupled out v...

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Bibliographic Details
Published in:IEEE photonics technology letters 2002-06, Vol.14 (6), p.753-755
Main Authors: den Besten, J.H., Broeke, R.G., van Geemert, M., Binsma, J.J.M., Heinrichsdorff, F., van Dongen, T., de Vries, T., Bente, E.A.J.M., Leijtens, X.J.M., Smit, M.K.
Format: Article
Language:English
Subjects:
Amplifiers
Arrays
Filters
Indium phosphide
Indium phosphides
Laser modes
Monolithic integrated circuits
Noise levels
Optical arrays
Optical coupling
Optical reflection
Photonics
Reflection
Ring lasers
Tunable circuits and devices
Waveguide lasers
Wavelengths
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Summary:A seven-channel ring laser was realized by monolithic integration of a compact 4/spl times/4 PHASAR (de)multiplexer with four amplifiers in InP. The PHASAR was fabricated using a double-etch technique, enabling a total size of the ring laser of only 1/spl times/1.5 mm/sup 2/. Light was coupled out via the outer array waveguides. Reflections are minimized by using mode filters and angled facets. Threshold-currents of 70 mA and a sidemode suppression ratio of 40 dB were measured. In principle, a ring laser with N amplifiers can produce 3N-3 different wavelengths.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2002.1003082