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Polarizer

A polarizer is used to obtain linearly polarized light having a particular polarization plane from other light such as elliptically polarized light than linearly polarized light. It is used to obtain a linearly polarized light component from linearly polarized light which is considered to be a combination of two linearly polarized light components having mutually perpendicular polarization planes. Polarizers have many industrial applications. For example, polarizers may be utilized in electro-optic modulators and laser subsystems. Many fiber optic systems have operational characteristics that are highly dependent on the polarization of the light guided by the optical fiber. The fiber optic polarizer is an indispensable component of a coherent fiber-optic communication system or fiber optic phase sensory system. Laser light can propagate along a waveguide in various ways. Two common modes of propagation are transverse-magnetic (TM) and transverse-electric (TE). Polarizers are used as building blocks of optical waveguide devices. TM-pass polarizers and TE-pass polarizers filter out one polarization component propagating in an optical waveform. Integrated polarizers must be compatible with the specific waveguiding structure. A polarizer is generally set up in front of a light source to polarize the light beam in conventional way. After the light beam passed the polarizer, the polarized light will enter a receiver such as polarized maintains fiber, monochromator, etc.

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