Title :
A compact digitally tunable seven-channel ring laser
Author :
den Besten, Jan Hendrik ; Broeke, R.G. ; van Geemert, M. ; Binsma, J.J.M. ; Heinrichsdorff, F. ; de Vries, T. ; Bente, E.A.J.M. ; Leijtens, X.J.M. ; Smit, M.K.
Author_Institution :
Opto-Electron. Devices Group, Eindhoven Univ. of Technol., Netherlands
fDate :
6/1/2002 12:00:00 AM
Abstract :
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.
Keywords :
III-V semiconductors; demultiplexing equipment; gallium arsenide; indium compounds; integrated optics; laser tuning; ring lasers; semiconductor optical amplifiers; wavelength division multiplexing; 70 mA; AWG; InGaAsP-InP; InP; PHASAR demultiplexer; angled facets; compact digitally tunable seven-channel ring laser; double-etch technique; mode filters; monolithic integration; outer array waveguides; reflection minimization; ring laser total size; semiconductor optical amplifiers; sidemode suppression ratio; threshold-currents; wavelength filter; wavelength-division multiplexing; Filters; Indium phosphide; Laser modes; Monolithic integrated circuits; Optical arrays; Optical coupling; Optical reflection; Ring lasers; Tunable circuits and devices; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1003082
