Quantum cascade laser in a master oscillator power amplifier configuration with Watt-level optical output power.
Opt Express
; 21(16): 19180-6, 2013 Aug 12.
Article
em En
| MEDLINE
| ID: mdl-23938833
ABSTRACT
We present the design and realization of short-wavelength (λ = 4.53 µm) and buried-heterostructure quantum cascade lasers in a master oscillator power amplifier configuration. Watt-level, singlemode peak optical output power is demonstrated for typical non-tapered 4 µm wide and 5.25 mm long devices. Farfield measurements prove a symmetric, single transverse-mode emission in TM(00)-mode with typical divergences of 25° and 27° in and perpendicular to growth direction, respectively. We demonstrate singlemode tuning over a range of 7.9 cm(-1) for temperatures between 263K and 313K and also singlemode emission for different driving currents. The side mode suppression ratio is measured to be higher than 20 dB.
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MEDLINE
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En
Ano de publicação:
2013
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Article