GaInAsP/InP distributed reflector laser with phase-shifted DFB and quantum-wire DBR sections

Kazuya Ohira; Tomonori Murayama; Saeed Mahmud Ullah; Hideki Yagi; Shigehisa Arai

doi:10.1587/elex.2.356

LETTER

GaInAsP/InP distributed reflector laser with phase-shifted DFB and quantum-wire DBR sections

Kazuya Ohira, Tomonori Murayama, Saeed Mahmud Ullah, Hideki Yagi, Shigehisa Arai

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Keywords: distributed feedback laser, distributed Bragg reflector, GaInAsP/InP, quantum wire, EB lithography, integration

JOURNAL FREE ACCESS

2005 Volume 2 Issue 11 Pages 356-361

DOI https://doi.org/10.1587/elex.2.356

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Abstract

A low-threshold-current distributed reflector laser consisting of phase-shifted distributed feedback (DFB) grating and quantum-wire distributed Bragg reflector (DBR) sections was realized. The device with a DFB length of 150µm, a DBR length of 240µm and a stripe width of 1.5µm achieved a threshold current as low as 1.2mA and a differential quantum efficiency of 13% from the front facet under RT-CW conditions. A good single-mode operation was also realized at a mode determined by the phase-shifted grating.

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