METHODOLOGY FOR A MEMS VARIABLE OPTICAL ATTENUATOR

Mems optical switch attenuation

The MEMS attenuator design achieves highly repeatable optical attenuation over C and/or L bands through a thermally-actuated reflective vane that intercepts light. DiCon's MEMS variable optical attenuator is a high quality VOA based on DiCon's industry proven MEMS mirror technology. These operate by collecting and collimating light from an input fiber and then reflecting this light off of an ultra-stable and reliable, single-axis DiCon MEMS mirror. These products provide the basis for spectrally efficient DWDM transmission utilizing dispersion tolerant modulation, channel monitoring, wavelength switching, remote power control and. These switches exhibit low insertion loss, meaning they cause minimal signal attenuation when routing optical paths. Besides 1 2 and 2 2 switches, rows and matrices of these switches with high port counts are required.

Principle of Attenuator Type Optical Attenuator

An optical attenuator, or fiber optic attenuator, is a device used to reduce the power level of an optical signal, either in free space or in an optical fiber. The basic types of optical attenuators are fixed, step-wise variable, and continuously variable.

Transmittance of Optical Attenuator

Optical attenuators are commonly used in fiber-optic communications, either to test power level margins by temporarily adding a calibrated amount of signal loss, or installed permanently to properly match transmitter and receiver levels. The power reduction is done by such means as absorption, reflection, diffusion, scattering, deflection, diffraction, and dispersion, etc.

What is the working principle of an adjustable mechanical optical attenuator

The working principle of MEMS VOA is based on the mechanical movement of the micro-mirror or micro-shutter. An optical attenuator is a passive optical device that has a function opposite to that of an optical amplifier. The attenuator circuit will allow a known source of power to be reduced by a predetermined factor, which is usually expressed as decibels. New for June 2019: mechanically variable attenuators are often used in lab equipment, so that one unit can serve many purposes (instead of a drawer full of fixed attenuators). They are continuously adjustable (using a thumb wheel or a screw head for examples), and consume zero DC power.

Adding an optical attenuator

Optical attenuators are commonly used in, either to test power level margins by temporarily adding a calibrated amount of signal loss, or installed permanently to properly match transmitter and receiver levels.

METHODOLOGY FOR A MEMS VARIABLE OPTICAL ATTENUATOR

Mems optical switch attenuation

Principle of Attenuator Type Optical Attenuator

Transmittance of Optical Attenuator

What is the working principle of an adjustable mechanical optical attenuator

Adding an optical attenuator

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