OPTICAL ISOLATOR

摘要

An optical isolator comprises a first fiber collimator (110), a first displacement crystal (120), an optical rotation device, and a second displacement crystal (130) that are successively disposed along a light path. The first fiber collimator (110) is connected to a first input fiber (111) to receive incident energy light from the first input fiber (111). The first displacement crystal (120) receives the energy light from the first fiber collimator (110) and splits the energy light into o light and e light. The optical rotation device receives o light and e light of the energy light from the first displacement crystal (120), and correspondingly converts o light and e light of the energy light into e light and o light of the energy light. The second displacement crystal (130) combines o light and e light of the energy light into one light beam, and outputs the light beam as a free space light beam (13). The optical isolator can implement forward pass and reverse isolation of the energy light. As indication light is also integrated, an application system does not need an additional optical device to combine the energy light and the indication light into one light beam, thereby reducing the size, decreasing the cost, and improving the system stability.