Novel compact SOI-based reconfigurable optical add/drop multiplexer using microring resonators - art. no. 60190L

Novel compact design for 4-channel SOI-based reconfigurable optical add/drop multiplexer using microring resonators is presented and analyzed. Microring resonators have two important attributes as a key new technology for future optical communications, namely functionality and compactness. Functionality refers to the fact that a wide range of desirable filter characteristics can be synthesized by coupling multiple rings. Compactness refers the fact that ring resonators with radii about 30 mu m can lead to large scale integration of devices with densities on the order of 10(4) similar to 10(5) devices per square centimeter. A 4-channel reconfigurable optical add/drop multiplexer comprises a grid-like array of ridge waveguides which perpendicularly cross through each other. SOI-based resonators consisted of multiple rings at each of the cross-grid nodes serve as the wavelength selective switch, and they can switch an optical signal between two ports by means of tuning refractive index of one of the rings. The thermo-optic coefficient of silicon is 1.86x 10(-4) /K. Thus a temperature rise of 27K will increase the refractive index by 5 x 10(-3), which is enough to cause the switching of our designed microring resonators. The thermo-optic effect is used to suppress the resonator power transfer, rather than to promote loss. Thus, the input signal only suffers small attenuation and simultaneously low crosstalk can be achieved by using multiple rings.

Reconfigurable Optical Add-Drop Multiplexer Based on Silicon Photonic Wire Waveguide

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Compact four-channel reconfigurable optical add-drop multiplexer using silicon photonic wire (vol 282, pg 3477, 2009)

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Rotman Lens Used as a Demultiplexer/Multiplexer

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A new type of microwave demultiplexer is proposed which combines an arrayed waveguide grating (AWG) and a Rotman lens. The dispersion property of an AWG is employed to produce different phase slope responses for different frequencies, while the Rotman lens routes the frequency components onto different ports. To optimize isolation performance, the design constraints of both the AWG and the Rotman lens are re-examined and new design criteria elaborated. The optimized design is demonstrated of being capable of achieving 15 dB channel isolation over a 25% band range centered at 10 GHz. While a design based on a conventional Rotman lens yields isolation level of around 6 dB over a 9% band range centered at 10GHz.

Illustrated parts breakdown : AN/GSC-24(V) multiplexer set 61860000.

"1 January 1976."

Organizational maintenance repair parts and special tools lists for multiplexer TD-754/G (NSN 5820-00-930-8078).

"May 1978."

Organizational, direct support and general support maintenance repair parts and special tools list (including depot maintenance repair parts and special tools) for multiplexer TD-1236/G, (NSN 5820-01-145-2461).

Includes index.

Operator's and organizational maintenance manual : multiplexer TD-1235(P)/TTC, (NSN 5820-01-145-2460).

"17 September 1984."

Operator's and organizational maintenance manual : multiplexer TD-1236/G, (NSN 5820-01-145-2461).

"17 September 1984."

Direct support and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools) for multiplexer TD-754/G, (NSN 5820-00-930-8078).

Includes index.

Direct support and general support maintenance repair parts and special tools list (including depot maintenance repair parts and special tools) for multiplexer, time division digital, TD-1069/G, (NSN 5805-01-028-8425).

Includes index.

Direct support and general support maintenance manual : multiplexer, time division, digital, TD-1069/G (NSN 5805-01-028-8425).

Includes index.

Operator's and organizational maintenance manual : multiplexer-combiner TD-1234(P)/TTC, (NSN 5820-01-145-2458).

Includes index.

Operators and organizational maintenance manual : 2-channel multiplexer TD-1288()/GRC (NSN 5820-01-090-1414) and 5-channel multiplexer TD-1289()(V)/GRC (NSN 5820-01-090-5407).

"24 August 1983."

Operator's and organizational maintenance manual : multiplexer TD-976/G (NSN 7025-01-048-9678) and pulse form restorer TD-982/G (NSN 7025-01-061-1245).

"October 1979."