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11 September 2007


Bookham expands discrete optics portfolio with 2.5Gb/s TOSA

At next week’s ECOC 2007 exhibition in Berlin, Germany, optical component, module and subsystem maker Bookham Inc of San Jose, CA, USA is launching an MSA-compatible 2.5Gb/s transmit optical subassembly (TOSA), expanding its portfolio of discrete optics (which also includes an XMD MSA-compliant ROSA receiver optical subassembly).

Set for commercial availability in November, the next-generation TOSA is designed as an in-feed to the growing TDM, CWDM and DWDM SFP (small form-factor pluggable) markets, and can also be used to replace 14-pin butterfly direct modulated lasers (DML) on card applications. Incorporating Bookham’s buried heterostructure laser (of which over 500,000 have been shipped in the last five years), the firm says that its TOSA technology has proven its reliability in Bookham’s DWDM SFP module.  

"Our established TOSA technology has underpinned our pluggable optics portfolio for many years,” says Graeme Morrison, Product Line Manager – Commodity Optics. “The decision to make a commercially available TOSA follows our strategy of vertical integration: offering our customers a full range of products, from discrete optics to packaged modules and subsystems.”

The TOSA has a transmission capability of 125Mb/s to 5.3Gb/s over 1600-6000ps/nm dispersion, with low penalty and a high extinction ratio of >10dB. At OC48 data rate it has a reach of up to 360km in the C-band and 200km and the L-band.

See related items:

First FP-based optical components for 10GBASE-LRM applications

Inventory reduction programs continue to “hurt” Bookham

NEC launches extended-reach XFP transceiver without dispersion compensation, based on AZNA’s CML

Optical chip and module manufacturers target 40 Gbit/s solution with Multi-Source Agreement