M. Cappuzzo

DISTRIBUTED FEEDBACK RIDGE WAVEGUIDE LASERS FABRICATED BY NANOSCALE PRINTING AND MOLDING ON NONPLANAR SUBSTRATES

This letter describes the use of printing and molding techniques to fabricate plastic photopumped laser that use distributed feedback resonators on ridge waveguides. The results indicate (i) potential optoelectronic applications of a set of emerging low cost lithographic techniques that can pattern a range of materials with submicron resolution on nonplanar substrates, (ii) a new type of plastic laser based on molded organic gain materials, and (iii) that thresholds of plastic distributed feedback ridge waveguide lasers are similar to their planar counterparts.

Large N x N waveguide grating routers

We show how the grating diffraction properties of a N/spl times/N waveguide grating router (WGR) can limit the size of N when the device operates with a unique set of N wavelengths as a strict-sense nonblocking N/spl times/N cross connect. We motivate why for large N, the N optical channels should be chosen equally spaced in wavelength and not in frequency. Two different approaches to increase N are presented. We report on results obtained in a 40/spl times/40 and a 80/spl times/80 WGR.

Bi-directionally amplified extended reach 40Gb/s CWDM-TDM PON with burst-mode upstream transmission

We demonstrate a 60-km CWDM-TDM PON with 40 Gb/s capacity both down and upstream. The system incorporates technologies such as volume manufacturable transmitters, burst-mode transmission, hybrid SOA-Raman amplifiers, and a cyclic CWDM multiplexer.

Hybrid integrated silicon optical bench planar lightguide circuits

As optical system architectures have matured over the past ten years, the use of silicon optical bench (SiOB) technology for cost effective packaging of opto-electronic components has migrated from relatively simple laser and photodetector submounts to sophisticated hybrid integrated optical subsystems. Lucent Technologies Bell Laboratories has been developing SiOB technology for use as an integrated packaging platform for lasers, photodetectors, waveguides and passive optical components. In this paper we describe two integrated optical sub-assemblies using planar lightguide circuits (PLCs) as examples of transceivers and complex laser source modules. The assemblies integrate lasers, photodetectors, passive waveguide splitters, wavelength division multiplex (WDM) filters, etched fiber and ball lens attachment sites, turning mirrors, optical reversing elements, deposited metals, solder dams and solders for mechanical and electrical contacts onto a single silicon optical sub-assembly. The approach allows for low cost batch processing, assembly and testing of complex components using the silicon wafer as a carrier and the use of automated pick-and-place machines for assembly.

A Symmetric-Rate, Extended-Reach 40 Gb/s CWDM-TDMA PON With Downstream and Upstream SOA-Raman Amplification

We demonstrate an extended reach 60 km coarse wavelength division multiplexing (CWDM)-time division multiple access (TDMA) passive optical network (PON) with 40 Gb/s capacity for both down and upstream directions. The system leverages existing 10 Gb/s TDMA PON technologies and incorporates various subsystems such as volume manufacturable optical transmitters, a prototype 10 Gb/s burst-mode receiver, hybrid semiconductor optical amplifier-Raman amplifiers, and a cyclic CWDM multiplexer. We confirm that this 32-user system has sufficient power margin to accommodate 128 users.

Automatic wavelength channel-by-channel equalizer

We demonstrate a wavelength equalizer that can automatically control individual channel powers in a 40 channel system, yet gives no distortion to channels that already have the same power as their neighbors. It has <6.8 dB insertion loss over 32 nm, 9-13 dB attenuation range, and <0.18 dB polarization/time-dependent loss.

Compact integrated dynamic wavelength equalizer

An integrated dynamic wavelength equalizer that can control attenuation at 22 points across 35 nm of spectrum in a smooth manner is presented. It achieves low loss and compactness because it consists of a Michelson interferometer with a waveguide grating router in only one arm.

Wavelength selective cross connect using arrayed waveguide lens multi-wavelength filters

We present an experimental demonstration of a partially equipped 128/spl times/128 OC-192 novel wavelength selective cross connect using a broadcast-and-select architecture. Novel silica multi-wavelength filters are key elements in the cross connect.

Optical Equalization of 42.7-Gbaud Band-Limited NRZ-DQPSK Signals for High-Spectral-Efficiency Transmission

We demonstrate the use of an optical equalizer to allow a 42.7-Gbaud (85.4-Gb/s) NRZ-DQPSK signal to tolerate the narrow optical filtering required in high-spectral-efficiency systems. The equalizer passbands are repetitive, enabling equalization of multiple channels.

Polarization-independent tunable dispersion compensator comprised of a silica arrayed waveguide grating and a polymer slab

We present a planar lightwave circuit tunable optical dispersion compensator that combines silica and polymer waveguides to achieve a low power consumption and low polarization dependence. We demonstrate dispersion compensation of a 10-Gb/s pluggable transceiver.