access icon openaccess Multi-wavelength channel 1.5 μm and 10 Gb/s EMBH DFB-LD array module using SAG technology

A multi-wavelength channel distributed feedback laser diode array (DFB-LDA) for the low-cost and low-power consumption applications of WDM-based datacentre networks is reported. The gain spectrum and lasing wavelength of each channel are controlled by using selective area growth and E-beam lithography techniques, respectively. To reduce the operation current and parasitic capacitance of the proposed array, an etched mesa buried hetero-structure (EMBH) is introduced. From this study, it was found that an eight-channel 300 μm long λ/4-shifted DFB-LDA has a threshold current of 10 ± 1.5 mA and a side mode suppression ratio of over 50 dB at a current of 50 mA for all channels. A transmission test for this LDA showed a clear eye opening with a dynamic extinction ratio of over 4.5 dB at 10 Gb/s after a 2 km transmission.

Inspec keywords: semiconductor laser arrays; telecommunication channels; electron beam lithography; computer centres; wavelength division multiplexing; optical communication equipment; optical testing

Other keywords: multiwavelength channel; selective area growth; lasing wavelength; clear eye opening; threshold current; transmission test; etched mesa buried heterostructure; bit rate 10 Gbit/s; operation current and parasitic capacitance; side mode suppression; EMBH DFB-LD array module; gain spectrum; E-beam lithography; current 50 mA; WDM-based datacentre networks; distance 2 km; wavelength 1.5 mum; distributed feedback laser diode array; dynamic extinction ratio; SAG technology

Subjects: Optical communication equipment; Design of specific laser systems; Semiconductor lasers; Multiplexing and switching in optical communication; Optical communication devices, equipment and systems; Optical testing techniques; Lasing action in semiconductors

References

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      • 1. IEEE 802.3ba 40 Gb/s and 100 Gb/s Ethernet Task Force public area, June 2010.
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      • 2. 10 × 10 Low cost 100 Gb/s pluggable optical transceiver [Online]. Available at: http://www.10×10msa.org/documents.htm, accessed August 2, 2012.
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