Low-chirp and high-power 1.55-/spl mu/m strained-quantum-well complex-coupled DFB laser |
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Authors: | Chi-Yu Wang Zuon-Min Chuang Wei Lin Yuan-Kuang Tu Ching-Ting Lee |
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Affiliation: | Telecommun. Lab., Minist. of Transp. & Commun., Taoyuan, Taiwan; |
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Abstract: | High-power, low-chirp, and low-threshold current characteristics of 1.55 /spl mu/m complex-coupled compressively strained InGaAsP quantum-well DFB laser with a loss grating are presented. Kink-free light-current characteristics with single-mode power over 40 mW are demonstrated for uncoated devices. A relatively low threshold current of 10 mA and a high slope efficiency of 0.23 W/A have been obtained even with the loss grating employed. Stable single-mode emission was demonstrated with a side mode suppression ratio up to 54 dB, a low chirp of less than 0.3 nm under 1 Gb/s pseudorandom digital modulation and a spectral linewidth of 8 MHz. |
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