Broadly wavelength-tunable external cavity lasers with extremely low power variation over tuning range |
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Authors: | Oh Kee Kwon Kang Ho Kim Eun Deok Sim Jong Hoi Kim Hyun Soo Kim Kwang Ryong Oh |
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Affiliation: | Opt. Commun. Devices Dept., Electron. & Telecommun. Res. Inst., Daejeon, South Korea; |
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Abstract: | Tunable external-cavity lasers with low power variation over a broad tuning range are demonstrated using asymmetric multiple quantum-wells with a wide and flat gain. For a 2.8-/spl mu/m-wide ridge waveguide laser of cavity length 380 /spl mu/m, when used in a grating external cavity and with an antireflection coating on one facet of laser diode chip, the power variation of less than -1 dB is obtained over a range of 80 nm. This extremely low power variation is a direct result of the spectrally flat gain. |
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