Modules

Coretek Opto Corp
Produces optical modules as well as fixed and pluggable optical transceivers.
http://www.coretek.com.tw/

Corona Optical Systems, Inc.
Manufactures a pair of small, 12 port, 850nm transmitters and receivers for data rates up to 3.35 Gbps per channel.
http://www.coronasys.com/

ExceLight Communications, Inc
Offers transceivers, transmitters, receivers, lasers, photodiodes, GaAs integrated circuits, and passive components for optical communications.
http://www.excelight.com/

Finisar Corp.
Provides fiber optic solutions for the fiber channel, gigabit ethernet and CATV markets.
http://www.finisar.com/

Oplink Communications, Inc
Provides custom design and manufacturing services for optical components.
http://www.oplink.com/

Opnext, Inc
Develops pluggable and fixed mount transmitters, receivers, transcievers, transponders, and discrete optical modules for rates ranging from 155 Mbps to 10 Gbps.
http://www.opnext.com/

Optical Communication Products, Inc (OCP)
Manufactures optical transmitters, receivers, transceivers, and transponders.
http://www.ocp-inc.com/

OPTICAL ZONU Inc.
Produces active and passive fiber optical modules, especially for PON and FDDx applications.
http://www.opticalzonu.com/

OptoIC Technology, Inc
Produces single and parallel optical transceivers ranging from 155 Mbps to 10 Gbps.
http://www.optoictech.com/

Picolight, Inc.
Makes single and parallel fiberoptic transceivers.
http://www.picolight.com/

Stratos Lightwave, Inc.
Manufactures fiber optic components, including single and parallel transceivers, fiber assemblies, WDM modules.
http://www.stratoslightwave.com/

TriQuint Semiconductor, Inc.
Develops optical modules as well as custom and off-the-shelf optical components, including EML (Electro-absorptive Modulated Laser), DFB (Distributed Feedback) and FP (Fabry-Perot) lasers and APD / PIN detectors.
http://www.tqs.com/