A fiber-embeded optical isolator with in-line fiber polarizer is proposed and fabricated. The optical isolator consists of the in-line fiber polarizers , the crystal Faraday roator , and the fiber GRIN-rod coupling system. In the coupling system, the both conventional and polarization maintaining single-mode fiber have been utilized. Isolation and insertion losses at 1. 5pm are 25dB and 4. 5dB, respectively.
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