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What kind of crystal is used in silicon photonics modules

What kind of crystal is used in silicon photonics modules

One-dimension (1D) photonic crystals have been widely used in silicon photonics due to its simple structure and multiple working regimes: difraction, Bragg reflection, and sub-wavelength regimes. Due to their periodic modulation of the refractive index they exhibit a band-structure for photons. After summariz-ing the theory of photonic bandgap materials, the preparation and linear optical properties of 1D, 2D, and 3D silicon-based photonic crystals are discussed. The original discovery of Photonic Crystals was reviewed by Yablonovitch in his popular SCIENTIFIC AMERICAN article. This feature results in a spectral region over which no light can propagate within such a material, known as the photonic band gap (PBG).

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Liquid Crystal Spatial Light Modulator

Liquid Crystal Spatial Light Modulator

(MIIPS) is a technique based on the computer-controlled phase scan of a linear-array spatial light modulator. Through the phase scan to an ultrashort pulse, MIIPS can not only characterize but also manipulate the ultrashort pulse to get the needed pulse shape at target spot (such as for optimized peak power, and other specific pulse shapes).

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The function of adjustable liquid crystal attenuator

The function of adjustable liquid crystal attenuator

Liquid crystal modulators provide electrically adjustable attenuation by altering the polarization state, which is then further attenuated by a polarizer. While these devices have limited power handling capabilities, they offer precise control over attenuation levels. Bulk attenuators can operate based on several principles, such as filter wheels with neutral density filters, rotated. The variable gray filter functions for polychromatic or monochromatic light as well as. Thorlabs' Liquid Crystal (LC) Optical Shutters / Variable Attenuators incorporate a liquid crystal cell sandwiched between polarizing elements that are used to quickly change the transmission to either block or attenuate light propagating through the devices. The transmission of the light can be adjusted as required by using the latest liquid crystal technology This makes the LCVA an indispensable. They can be applied to both free-space laser beams and telecom signals transmitted through optical fibers.

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Four-fiber optic switch with two electrical components

Four-fiber optic switch with two electrical components

The switch consists of two 1x2 switches (A & B components) with two input ports and four output ports that transmit, redirect, or block optical signals in the fiber. The two optical switches will be actuated to select a pair of fiber (A and B) from Ch1 or Ch2. Designed for Optical Fiber Switching from 1 Input up to 9 Outputs Piezoelectric driven switches are especially designed for fast switching – measured in milliseconds – low loss and high repeatability. For extremely precise measurement systems and sensor applications as well as for telecommunication applications LASER COMPONENTS offers fiber optical multimode (MM) switches with a fiber core diameter of 50 µm to 600 µm. Applications include optical protection, optical channel monitoring, remote fiber.

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