Finisar

About: Finisar is a company organization based out in Sunnyvale, California, United States. It is known for research contribution in the topics: Signal & Laser. The organization has 900 authors who have published 1523 publications receiving 22634 citations.

Developments in linear optical amplifier technology

Abstract: The Linear Optical Amplifier (LOA) is a chip-based amplifier that addresses many of the requirements of emerging optical networks: operation under diverse bit rates, channel counts, and switching protocols, as well as reduced cost and size In this work, we review the operating principles of the LOA, and describe two versions of the LOA technology The first is a polarization-independent amplifier that operates over the entire C-band We present several examples of this technology's system performance, and also highlight its value in coarse wavelength-division multiplexing (CWDM) applications We also demonstrate a new, single polarization LOA technology, which is designed to deliver high linear gain over an extended range of output powers We measure typical chip gains in excess of 20dB, and demonstrate linear gain performance for an (average) chip power approaching 15dBm These results indicate that this technology is well-suited for long-reach, 10Gbps transmitter boost applications

Reach Extension and Capacity Enhancement of VCSEL-Based Transmission Over Single-Lane MMF Links

Abstract: This paper reviews and examines several techniques for expanding the carrying capacity of multimode fiber (MMF) using vertical cavity surface emitting lasers (VCSELs). The first approach utilizes short wavelength division multiplexing in combination with MMF optimized for operation between 850 and 950 nm. Both nonreturn to zero (NRZ) and four-level pulse amplitude modulation (PAM4) signaling are measured and demonstrate up to 170-Gb/s postforward error correction transmission over 300 m. For single wavelength transmission, the use of selective modal launch to increase the optical bandwidth of a standard OM3 MMF to more than 2.1 GHzckm for standard MMF is presented. A statistical model is used to predict the bandwidth enhancement of installed MMF and indicates that significant link extension can be achieved using selective modal launch techniques. These results demonstrate the continued effectiveness of VCSEL-based MMF links in current and future data center environments.

Dual segment molded lead frame connector for optical transceiver modules

Abstract: Exemplary embodiments of the present invention illustrate lead frame connectors for connecting optical sub-assemblies to printed circuit boards in optical transceiver modules. The lead frame connectors include a stamped and bent conductive lead structure that is encased in a plurality of insert injection molded plastic casings. The plastic casings provide electrical insulation for the conductors in the lead frame as well as mechanical support for the finished component. The lead frame connectors connect to the leads associated with the optical sub-assemblies and are surface mounted onto the printed circuit board to establish connectivity between the optical sub-assembly and the printed circuit board.

Monolithic shell for an optical electrical device

Abstract: An optoelectronic transceiver module. The optoelectronic module is a monolithic, one-piece module shell that includes a top portion, a bottom portion, a first side portion, a second side portion, and a front portion. The top portion, bottom portion, first side portion, second side portion and the front portion define a cavity configured to enclose electro-optical circuitry. In addition, the top portion and the bottom portion are configured such that the top portion is not separable from the bottom portion. Further, the front portion defines at least one of an optical transmit port or an optical receive port.

Absorbing layers for reduced spontaneous emission effects in an integrated photodiode

Abstract: An optical structure that reduces the effects of spontaneous emissions from the active region of a laser. An optical structure includes optimizations to reduce the effects of spontaneous emissions. The optical structure includes a VCSEL with top and bottom DBR mirrors and an active region connected to the mirrors. The optical structure further includes a photodiode connected to the VCSEL. One or more optimizations may be included in the optical structure including optically absorbing materials, varying the geometry of the structure to change reflective angles, using optical apertures, changing the reflectivity of one or more mirrors, changing the photodio0de to be more impervious to spontaneous emissions, and using ion implants to reduce photoluminescence efficiency.