Title :
All-fiber 3 × 3 interleaver design with flat-top passband
Author :
Wang, Qijie ; Zhang, Ying ; Soh, Yeng Chai
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
In this letter, a three-port all-fiber flat-top optical interleaver is developed by using a new configuration of cascading three 3 × 3 directional fiber couplers. An approach that is based on the maximally flat principle is used to design the interleaver with a flat-top transmission. The proposed design approach also allows one to design interleavers with certain passband ripples in order to obtain a wider passband bandwidth. A 100/300-GHz three-port interleaver with a passband bandwidth of 40 GHz at 0.5 dB is demonstrated by experiment.
Keywords :
multiplexing equipment; optical communication equipment; optical directional couplers; optical fibre couplers; optical fibre fabrication; optical fibre filters; wavelength division multiplexing; 40 GHz; all-fiber optical interleaver; cascading three directional fiber couplers; couplers fabrication; dense wavelength-division multiplexing; design approach; maximally flat principle; mode coupling theory; multiport optical interleavers; passband ripples; phase shifts; single-mode fibers; three-port flat-top optical interleaver; Arm; Couplings; Optical design; Optical fiber couplers; Optical fibers; Optical refraction; Optical sensors; Optical variables control; Passband; Propagation delay;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.820458
