A compact digitally tunable seven-channel ring laser

J.H. Besten, den, R.G. Broeke, M. Geemert, van, J.J.M. Binsma, F. Heinrichsdorff, T. Dongen, van, T. Vries, de, E.A.J.M. Bente, X.J.M. Leijtens, M.K. Smit

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A seven-channel ring laser was realized by monolithic integration of a compact 4×4 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 1×1.5 mm2. 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
Original languageEnglish
Pages (from-to)753-755
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number6
Publication statusPublished - 2002


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