Monolithic integration of thin film μ-heater array with 4-channel WDM transmitter |
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Authors: | Sang-Wan Ryu Sung-Bock Kim Jae-Sik Sim Yong-Duck Chung Jong-Hyun Lee Jeha Kim |
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Affiliation: | Electronics and Telecommunication Research Institute, 161 Kajong-Dong, Yusong-Gu, Taejon 305-350, South Korea |
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Abstract: | We integrated a μ-heater array with a multi-wavelength laser array for accurate control of the channel spacing. A μ-heater array was formed on a 4-channel laser array with asymmetric sampled gratings. The lasers showed threshold current of 9-13 mA and slope efficiency of around 0.21 W/A. High side mode suppression ratio over 44 dB was observed as well. With the μ-heaters, all the laser wavelengths were precisely controlled simultaneously. The laser wavelength was red shifted with the μ-heater and the tuning efficiency was 3.3 nm/W. However, thermal crosstalk between neighboring channels was observed and it was measured to be 1.1 nm/W. |
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Keywords: | Multi-wavelength laser array μ-Heater Wavelength division multiplexing |
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