Jds Uniphase Corporation

Chris Hart

William K Hogan

David Peter Gaio

Vincent M Wong

Jay A Skidmore

Edmund L Wolak

Erji Mao

Robert K Wolf

Mark J Bailey

Erik Paul Zucker

Hui Fu

Craig Young

Philip Deane

Jeffrey P Zack

Heino Bukkems

Anand Shukla

Anthony T Yesenofski

Wei Xu

Randolph W Hines

Martin A Helfand

The present invention relates to an optical sub-assembly, i.e. a receiver optical subassembly or a transmitter optical sub-assembly, for use in an optical transceiver device. The optical sub-assembly according to the present invention includes a hermetic ceramic package with a multi-layer ceramic structure providing a unique RF signal and ground structure providing a controlled signal impedance to achieve high signal transmission quality.

Compact optical sub-assembly with ceramic package

The invention relates to a compact transmitter optical sub-assembly (OSA), which can be used in small form factor optical transceivers. To limit back reflections from entering the laser cavity, the laser is disposed on a silicon optical bench (SiOB) at an acute angle to the longitudinal axis of the OSA. A portion of the light from the laser cavity passes through the back end of the laser cavity for measuring by a monitor photodiode. A rear beam steering lens redirects the portion of light into a v-groove in the SiOB and off of a reflective surface formed in the end thereof to the monitor photodiode, which is positioned face down over the v-groove.

Compact optical sub-assembly

A high power light source having an array, bundle or separate plurality of laser diodes coupled to a same number of multimode waveguides to collect beams of light emitted from the of laser diodes is provided. An optical combiner receives the beams of light and combines the beams of light into a single forward propagating beam of light so that substantially all optical radiation within each beam of light overlaps the optical radiation each other beam to form the single beam. A reflective element is located to receive the single forward propagating beam of light and transmits greater than 60% of the single forward propagating beam of light therethrough. The reflective element reflects between 3&#x2013;40% of the single forward propagating beam back to the laser diodes as feedback to stabilize said laser diodes.

Wavelength stabilized laser

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West Melbourne, FL, United States of America

Chris Hart