Temperature-dependent performance of 1.55 ÎŒm vertical-cavity lasers with InGaAsP/InP bottom mirror

• We have fabricated and evaluated a long-wavelength vertical-cavity laser (VCL) based on an epitaxially integrated InP distributed Bragg reflector (DBR) under continuous wave (CW) and pulsed conditions. We conclude that, for an InP-DBR-down configuration, the high-temperature performance is limited by the heat conductivity of the bottom mirror. The highest operating temperature for CW and pulsed condition is 17 °C and 101 °C respectively, indicating a substantial self-heating for CW. To investigate the prospect for improved performance in other mounting configurations, we have applied a two-dimensional finite element analysis to the heat transfer problem. It is suggested that for top-side-down mounting with the AlGaAs/GaAs DBR closest to the heat sink, a performance comparable to that of so called double-fused VCLs could be possible.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Continuous wave lasers

Finite element method

Heat sinks

Heat transfer

Heating

Laser pulses

Mirrors

Semiconducting aluminum compounds

Semiconducting gallium arsenide

Semiconducting indium phosphide

Semiconductor device manufacture

Thermal effects

Distributed Bragg reflectors (DBR)

Low-wavelength vertical-cavity lasers (lw-VCL)

Semiconductor lasers

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