Title :
Broad-band LP02 mode excitation using a fused-type mode-selective coupler
Author :
Song, Kwang Yong ; Kim, Byoung Yoon
Author_Institution :
Dept. of Phys., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
We demonstrate a novel fused-type directional coupler that couples the LP/sub 01/ mode in one fiber and the LP/sub 02/ mode in another using a few-mode fiber. The phase-matching condition was satisfied in the coupler waist by initially etching and prepulling portions of the fibers based on simple numerical calculation. A coupling efficiency of about 70% was maintained over 1515-1595-nm wavelength range, and the mode extinction ratios with LP/sub 01/, LP,/sub 11/, and LP/sub 21/ modes were measured to be 35,20, and 7 dB, respectively.
Keywords :
optical directional couplers; optical fibre couplers; optical filters; 1515 to 1595 nm; broad-band LP/sub 02/ mode excitation; coupler waist; directional couplers; few-mode fiber; fused-type mode-selective coupler; phase-matching condition; Arm; Bandwidth; Frequency conversion; Interference; Optical coupling; Optical fiber communication; Optical fiber couplers; Optical fiber devices; Optical fiber polarization; Optical sensors;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.819710
