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Wide Temperature Range Operation of a 1.55- \mu m 40-Gb/s Electroabsorption Modulator Integrated DFB Laser for Very Short-Reach Applications

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9 Author(s)
Kobayashi, W. ; Photonics Labs., NTT Corp., Atsugi, Japan ; Yamanaka, T. ; Arai, M. ; Fujiwara, N.
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We present the uncooled operation of a 1.55- mum 40-Gb/s InGaAlAs electroabsorption modulator (EAM) integrated distributed-feedback (DFB) laser within a temperature range of 95degC (-15degC to 80degC ). To the best of our knowledge, this is the largest temperature range reported so far for such a 40-Gb/s EAM integrated DFB laser. We designed the EAM to operate at high speed by reducing the electrical parasitics, and we achieved a 3-dB frequency bandwidth of over 39 GHz for an EAM length of less than 150 mum. We demonstrated a 2-km single-mode fiber (SMF) transmission at 40-Gb/s over a wide temperature range of -15degC to 80degC by adjusting only the bias voltage to the EAM while keeping the modulation voltage swing constant at 2.0 V when the temperature changed. We achieved a dynamic extinction ratio of over 8.2 dB and a 2-km SMF transmission with a power penalty of less than 2 dB over a wide temperature range.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 18 )

Date of Publication:

Sept.15, 2009

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