Tunable picosecond pulses from gain-switched grating-coupled surface-emitting laser

Oleg V. Smolski; Jun Jiang; Chandrasekhar Roychoudhuri; G. B. Venus; Jeff Bullington; Efim L. Portnoi

doi:10.1117/12.467966

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22 May 2002 Tunable picosecond pulses from gain-switched grating-coupled surface-emitting laser

Oleg V. Smolski, Jun Jiang, Chandrasekhar Roychoudhuri, G. B. Venus, Jeff Bullington, Efim L. Portnoi

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Proceedings Volume 4651, Novel In-Plane Semiconductor Lasers; (2002) https://doi.org/10.1117/12.467966
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

Abstract

We have demonstrated a 60 nm-tunable, 160 psec-width, optical pulses from a 980 nm Grating Coupled Surface Emitting Laser (GCSEL) in an external cavity under nanosecond pump pulses. GCSEL is in-plane laser monolithically integrated with grating outcoupler. The grating was detuned from second order Bragg condition and it served as an efficient interface between planar waveguide and free space. Wavelength tuning was simply achieved by tilting an external flat mirror provided wavelength selective feedback to the GCSEL chip. Gain switched pulses with wavelength linewidth less than 0.1 nm and peak power of 200 mW have been obtained. In our experiments we measured a shortest optical pulses by reducing a distance between external mirror and laser diode chip. This corresponded with decreasing the effective laser cavity length and the cavity round-trip time as well.

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Oleg V. Smolski, Jun Jiang, Chandrasekhar Roychoudhuri, G. B. Venus, Jeff Bullington, and Efim L. Portnoi "Tunable picosecond pulses from gain-switched grating-coupled surface-emitting laser", Proc. SPIE 4651, Novel In-Plane Semiconductor Lasers, (22 May 2002); https://doi.org/10.1117/12.467966

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