Jean-Marc Verdiell

Electronic dispersion compensation for 10 Gigabit communication links over FDDI legacy multimode fiber

In this paper, we demonstrate measured results from two different EDC architectures, a feed forward equalizer (FFE) and a decision feedback equalizer (DFE). These are used to compensate for ISI caused by modal dispersion in highly band-limited multi-mode fiber links.

A High-Degree Photonic Cross-Connect for Transparent Networking, Flexible Provisioning & Capacity Growth

Photonic cross-connects with duplex-port count exceeding the nodal degree enable transponder steering and span relief for traffic growth. We demonstrate a fully-loaded degree-6 PXC, supporting 2.4 Tb/s in 40 wavelengths, built from wavelength-selective switches.

Automated opto-electronic packaging for 10 Gb/s transponders

Integrated transponders are quickly displacing discrete module implementation in many 10 Gb/s line card designs. The emergence of the 10 Gigabit Ethernet (10 GbE) standard had placed higher demands on manufacturing scalability to meet the volume requirements of this application. To meet these challenges, we have developed a novel automated manufacturing implementation of small form factor, high performance, and highly integrated uncooled optics. We describe the design and automated manufacturing of such modules, present their performance, and show how they enable the implementation of new miniature, low cost 10 Gb/s transponders.

Monolithically integrated high-speed high-power diffraction-limited semiconductor sources for space telecommunications

High-power semiconductor sources capable of high-speed modulation are very desirable for free-space digital telecommunications such as satellite optical communication links. Moreover, a diffraction limited beam quality is necessary for most applications. We describe advances in the development of high-power, diffraction-limited semiconductor lasers based on the master oscillator/power amplifier (MOPA) architecture and capable of high-speed modulation. Devices containing monolithically integrated electro-absorption or phase modulators demonstrate 5 GHz small signal modulation bandwidth at 1 W output power.

PCIe optical interconnects

We have demonstrated PCIe optical connections over fiber up to 300m distances. Due to their high bandwidth, low weight, immunity to EMI interference, and ruggedness of the electrical connector interface, PCIe Active Optical Cables present many advantages over copper cables in avionics applications.

Extended temperature performance of 120 Gbps midboard optical engine

Industrial and military requirements for optics dictate the ability to operate reliably over a myriad of extreme environmental conditions such as extended temperature, increased shock and vibration, high particulate environments, etc. While it is paramount that the transceiver be able to maintain performance over these extreme conditions, considerations for the optical interconnects in the signal path are often overlooked. In general, optical performance tends to degrade as the operating temperature drifts from nominal conditions. Likewise, optical connector performance degrades at higher shock and vibration levels. As a result, optical products are generally limited to operating at case temperatures between 0 °C – 70 °C and struggle at high shock and vibration levels. In this paper we demonstrate the performance of the Samtec 12 channel FireFlyTM at 10 Gbps, -40 °C and 85 °C case temperature coupled with the expanded beam MXCTM connector from US Conec. Optical eye diagrams and receiver sensitivity for a link that includes 100 m of OM3 fiber, reliability results for transmitters operating at extended temperature, and shock and vibration data are presented.

Extended temperature performance of VCSEL based optical transmitter

In this paper we demonstrate the extended temperature performance of Samtecs 12 channel FireFly optical transmitter at 10.3125 Gbps. The results indicate that the transmitter has more than 25% mask margin when operating between -40 °C and 90 °C. Reliability results for 11 different transmitters operating at 85 °C indicate that the output power of the laser changes by less than 0.5 dB after 2000 hours of continuous operation.

High-power, single-mode fiber-coupled 1.3-/spl mu/m strained quantum well lasers

Summary form only given. In conclusion, we have demonstrated high-power 1.3-/spl mu/m lasers obtained from strained quantum well material. Fiber coupled lasers exhibit 100-mW cw output power.

Semiconductor laser transmitters for WDM

WDM semiconductor sources are needed to fulfill the requirements of future high-speed, all- optical fiber networks. The key technical challenge is to meet at the same time all of the tight requirements on wavelength accuracy, stability over time, high-speed operation, simplicity of control electronics, and low cost that practical systems demands. State-of-the-art of WDM component technology is explored and the many available technological options are presented and compared.