MEMS-Based Optical Gain Equalizer Packs Control Circuitry

April 1, 2002
Designed for small size, flexibility, and ease of use, Lightconnect's optical Dynamic Gain Equalizer (DGE) integrates a diffraction-grating MEMS (microelectromechanical system) structure with control electronics in just 220 by 110 by 19 mm. Packaged...

Designed for small size, flexibility, and ease of use, Lightconnect's optical Dynamic Gain Equalizer (DGE) integrates a diffraction-grating MEMS (microelectromechanical system) structure with control electronics in just 220 by 110 by 19 mm. Packaged with all the supporting hardware and software, it can be implemented directly on a system motherboard.

This second-generation module boasts a 5.7-dB insertion loss, a 0.3-dB polarization-dependent loss, a 50-µs response time, gain flatness within ±0.2 dB, and a 15-dB dynamic range. It can flatten erbium-doped fiber-amplifier (EDFA) gain profiles to within ±0.1 dB. Also, it's customer configurable for the 40-nm range in the C or L band.

The DGE's MEMS grating ribbon features 0.4-µm motion. The high resonant frequencies of the MEMS ribbons increase speed by 50 to 500 times over competing technologies while providing a robust optical platform virtually unaffected by ambient acoustic and seismic disturbances. No temperature control is required. Closed-loop control with the host sets the target spectrum. Alarm-handling and status-reporting features are included as well.

The DGE module costs $10,000 to $15,000, based on volume and performance requirements. Samples are available now. Production quantities are scheduled for the second quarter.

Lightconnect Inc., www.lightconnect.com; (510) 713-3120.

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About the Author

Roger Allan

Roger Allan is an electronics journalism veteran, and served as Electronic Design's Executive Editor for 15 of those years. He has covered just about every technology beat from semiconductors, components, packaging and power devices, to communications, test and measurement, automotive electronics, robotics, medical electronics, military electronics, robotics, and industrial electronics. His specialties include MEMS and nanoelectronics technologies. He is a contributor to the McGraw Hill Annual Encyclopedia of Science and Technology. He is also a Life Senior Member of the IEEE and holds a BSEE from New York University's School of Engineering and Science. Roger has worked for major electronics magazines besides Electronic Design, including the IEEE Spectrum, Electronics, EDN, Electronic Products, and the British New Scientist. He also has working experience in the electronics industry as a design engineer in filters, power supplies and control systems.

After his retirement from Electronic Design Magazine, He has been extensively contributing articles for Penton’s Electronic Design, Power Electronics Technology, Energy Efficiency and Technology (EE&T) and Microwaves RF Magazine, covering all of the aforementioned electronics segments as well as energy efficiency, harvesting and related technologies. He has also contributed articles to other electronics technology magazines worldwide.

He is a “jack of all trades and a master in leading-edge technologies” like MEMS, nanolectronics, autonomous vehicles, artificial intelligence, military electronics, biometrics, implantable medical devices, and energy harvesting and related technologies.

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