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16-wavelength gain-coupled DFB laser array with fine tunability

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4 Author(s)
Li, G.P. ; Bell-Northern Res., Ottawa, Ont., Canada ; Makino, T. ; Sarangan, A. ; Huang, W.

16-wavelength semiconductor laser array with fine wavelength tunability is demonstrated, utilizing gain-coupled distributed feedback (DFB) lasers with different ridge waveguide widths. Besides the coarse tuning by the ridge widths, the fine post-fabrication tunability for individual lasers in the array is achieved with a Ti thin-film resistor integrated on the chip. Due to the gain-coupling effect, 16 single-mode lasing wavelengths around 1.55 μm in /spl sim/1 nm spacing are obtained simultaneously. An effective fine-tuning up to 1 nm is observed at a moderate heating power of 100 mW.

Published in:

Photonics Technology Letters, IEEE  (Volume:8 ,  Issue: 1 )