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Low-Threshold and High-Efficiency Operation of Distributed Reflector Laser With Wirelike Active Regions

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6 Author(s)
Shindo, T. ; Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan ; SeungHun Lee ; Takahashi, D. ; Tajima, N.
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A high differential quantum efficiency of about 50% from the front facet and low threshold current operation have been achieved. By modifying the doping profile in 1.55-mum distributed reflector lasers, waveguide loss was reduced from 6-7 to 4 cm-1 . Injection currents of 4.2 and 3.6 mA were obtained to achieve a 1-mW output power for lasers with uniform and phase-shifted grating structures, respectively.

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Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 19 )