Necessary cookies are absolutely essential for the website to function properly. This type of isolators are commonly used in fiber optic communication systems, CATV links, fiber laser and amplifiers. Customer can choose from polarize sensitive or incentive, C band or L band. Neptec offers micro-optics isolators that operate in a wide range of wavelength. ![]() Micro-optics Isolator for Telecommunication These isolators are used to protect laser or amplifier. Special wavelength and hybrid options are available. Neptec’s high power isolators can handle power from 500mW to 100W depend on the customization option. Customization and hybrid options with receptacle, collimator and fiber array are available. Neptec’s free space isolator are high isolation and low insertion loss. Neptec will introduce these products at the in coming Photonics West exhibition. Below is an overview of Neptec’s optical isolators. Neptec’s product can be customized to meet customers’ system requirement. Neptec offers a wide range of polarize sensitive and insensitive optical isolators for both high power and optical communication applications. Neptec Optical Solutions, a global specialty optical fiber company, has 10-year experience in design and manufacturing fiber optic components. In such a system, the angle of polarization will lead to a loss. On the other hand, polarization sensitive isolators are used in free space optical and coherence communication systems. Generally, polarization insensitive isolator creates an arbitrary phase change between the two polarization components. Polarization insensitive (non-polarized) isolators are commonly used in optical fiber communication systems before and after fiber amplifiers. The insertion loss depends on the type and quality of polarizer, the precision and uniformity of rotation angles obtained in the rotator. These kinds of isolator are called dual stage isolator. When a single isolator cannot achieve the desired degree of isolation, a combination of two isolators, usually packed into one housing, are used. ![]() When operating at a non-optimized wavelength, the degree of isolation will be reduced. High degree isolation is difficult to achieve for high-power devices. Typical isolators can achieve isolation 30-40 dB. Besides, in the high-power optical system, back reflection can cause system instabilities and power spikes. Back reflection and scattering can damage a laser source. ![]() Optical isolator can protect signal sources from back reflections and back scattering. It pressures the magnetic element of a Faraday rotator, which is usually a rod designed with a magnetic crystal beneath the strong magnetic field through Faraday Effect.Optical isolator is a passive optical device that only allows unidirectional travel of light. This type of isolator is also named as the polarized optical-isolator in a new face. This is an independent polarized type optical-isolator, which can be used in EDFA optical amplifier which includes different components like wavelength-division multiplexer (WDM), erbium-doped fiber, pumping diode laser, etc. The latter is more complicated and often used in EDFA optical amplifier. Also, there are dependent and independent polarized optical-isolators. It allows light to transmit in forwarding direction, however, prohibits every light beam to transmit back. This isolator uses the polarization axis to keep light transmit in one direction. Optoisolators are classified into three types which include Polarized, Composite, and Magnetic optical-isolator Polarized Type Optical-Isolator Thus, the light beam will be either absorbed or reflected. ![]() After that, the 90° polarization light turns into vertical toward the i/p polarizer & cannot depart the isolator. When it transmits throughout the Faraday rotator, rotates continuously for another 45° in a similar path. Similarly in backward mode, initially the light enters into the o/p polarizer with a 45°. Therefore, finally, the light leaves from the o/p polarizer at 45°. Once the light beam arrives at the Faraday rotator, then the rod of the Faraday rotator will turn with 45°. In forward mode, the light enters into the input polarizer then becomes linearly polarized. The operation modes of this isolator are classified into two types based on the different directions of light such as forward mode & backward mode. The working of this is like when light passes through the i/p polarizer in the forward direction & turn into polarized within the vertical plane. The block diagram representation is shown below. An optical isolator includes three main components namely a Faraday rotator, i/p polarizer, & an o/p polarizer.
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