L. Gomez

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.

Recent progress in Erbium-doped waveguide amplifiers

We will describe Er-doped aluminosilicate waveguide amplifiers integrated with 980nm/1550nm WDM on Silicon Optical Bench and report on their performance. Recent progress in Er-doped waveguide amplifiers will be reviewed.

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.

Optical MEMS devices for telecom systems

As telecom networks increase in complexity there is a need for systems capable of manage numerous optical signals. Many of the channel-manipulation functions can be done more effectively in the optical domain. MEMS devices are especially well suited for this functions since they can offer large number of degrees of freedom in a limited space, thus providing high levels of optical integration. We have designed, fabricated and tested optical MEMS devices at the core of Optical Cross Connects, WDM spectrum equalizers and Optical Add-Drop multiplexors based on different fabrication technologies such as polySi surface micromachining, single crystal SOI and combination of both. We show specific examples of these devices, discussing design trade-offs, fabrication requirements and optical performance in each case.

Compact spectral pulse shaping using hybrid planar lightwave circuit and free-space optics with MEMS piston micromirrors and spectrogram feedback control

We combine a PLC and free-space optics for a compact Fourier-plane pulse shaper with low polarization dependencies. A micromirror array with piston motion provides phase modulation. The shaped electric field is extracted from a recorded spectrogram of the synthesized waveform.

Hybrid integration for low-cost OE packaging and PLC transceiver

We will describe in this paper a technology to integrate all the optical functions on one single piecepart, the planar lightguide circuit (PLC), departing from the traditional approach of separately packaged transmitter (Tx) and receiver (Rx). The rationale is that the increase in complexity/cost incurred at wafer-scale processing is, in large volume (>100k/yr), greatly outweighed by the reduction in the final number of pieceparts/assembly cost, resulting in a net lowering of the overall cost of the optical network unit.

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.

Nonlinear Spatial Dispersion Generation with a MZI-AWG for hybrid PLC-FSO Wavelength-Selective Switches and Wavelength Blockers

A planar lightwave circuit with a length-imbalanced Mach-Zehnder interferometer and an arrayed waveguide grating radiating into free-space generates nonlinearly spatially dispersed light. This arrangement is advantageous for mitigating mirror edge effect in MEMS-based components.