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External cavity laser with a vertically etched silicon blazed grating

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2 Author(s)
Lohmann, A. ; Dept. of Electr. & Electron. Eng., Imperial Coll., London, UK ; Syms, R.R.A.

An external cavity laser based on a stripe waveguide semiconductor optical amplifier, a ball lens, and a blazed diffraction grating fabricated by vertical deep reactive ion etching of silicon is demonstrated. Bandpass characteristics for a 12th-order grating are given. Tuning of an external cavity laser over a 120-nm spectral range is demonstrated, with a maximum single-mode fiber-coupled power of 1 mW and side-mode suppression ratio of 30 dB.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 1 )