This type of isolator is also named as the polarized optical-isolator in a new face. A typical competitor isolator in the same band measures 25 x 25 x 70 mm and weighs 60 grams. For example, in the WR-10 band 75-110 GHz, an MHC isolator has external dimensions of 19 x 19 x 16.7 mm and weighs only 16 grams. 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. Micro Harmonics produces the most compact and lightest weight isolators on the global market. 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°. The 49☌ (120☏) maximum temperature is used as a baseline to determine maximum safe power levels for the Micro Harmonics isolators. 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. Isolator When one port of a three-port circulator is terminated in a matched load, it can be used as an isolator, since a signal can travel in only one direction between the remaining ports. 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.
0 kommentar(er)
