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Broad-range wavelength-tunable superstructure grating (SSG) DBR lasers

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7 Author(s)
Tohmori, Y. ; Opto-Electronics Lab., NTT, Kanagawa, Japan ; Yoshikuni, Yuzo ; Ishii, H. ; Kano, F.
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A broad tuning range is demonstrated in tunable DBR lasers with a novel superstructure grating (SSG). These SSG reflectors were fabricated by electron-beam lithography, and grating performance was evaluated by measuring the transmittance characteristics of a ridge-type SSG reflector. Incorporating this SSG reflector into distributed-Bragg-reflector (DBR) laser results in lasers that can be tuned over a wide wavelength range by using coarse and fine tuning mechanisms. Wavelength-tunable SSG DBR lasers were fabricated and operated under low-threshold CW conditions. Wavelength tuning ranges of 50 and 100 nm were designed and experimentally measured to be 50 and 83 nm, respectively, with single-mode operation

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Quantum Electronics, IEEE Journal of  (Volume:29 ,  Issue: 6 )