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Broadband tunable external cavity laser using a bent-waveguide quantum-dot superluminescent diode as gain device

Authors
  • wu, j
  • xq, lu
  • jin, p
  • meng, xq
  • wang, zg
Publication Date
Jan 01, 2011
Source
Knowledge Repository of SEMI,CAS
Keywords
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Unknown
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Abstract

<span style="font-size: 10pt; font-family: 'Arial','sans-serif'">A broadband tunable grating-coupled external cavity laser is realized by employing a self-assembled InAs/GaAs quantum-dot (QD) superluminescent diode (SLD) as the gain device. The SLD device is processed with a bent-waveguide structure and facet antireflection (AR) coating. Tuning bandwidths of 106 nm and 117 nm are achieved under 3-A and 3.5-A injection currents, respectively. The large tuning range originates essentially from the broad gain spectrum of self-assembled QDs. The bent waveguide structure combined with the facet AR coating plays a role in suppressing the inner-cavity lasing under a large injection current.</span>

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