Abstract
Three new design waveguides for adiabatic directional full couplers are studied. We theoretically and numerically show that the performance of new full couplers is improved. When the length of the coupler is 4mm (the minimum local beat length is 2mm) at 1.57um wavelength, the crosstalk is smaller than -35dB. For the length of the coupler is 4mm, the crosstalk is smaller than -20dB in the 1.5um-1.7um range. For the length of the couplers is 7mm, we find that the crosstalk is smaller than -35dB in the 1.5um-1.7um range. The same as the requirement of the maximum crosstalk, the corresponding wavelength is between 1.42um to 1.7um when the length of the couplers is 12mm.
| Original language | English |
|---|---|
| Pages (from-to) | 355-364 |
| Number of pages | 10 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5279 |
| DOIs | |
| State | Published - 2004 |
| Event | APOC 2003: Asia-Pacific Optical and Wireless Communications: Optical Fibers and Passive Components - Wuhan, China Duration: 4 Nov 2003 → 6 Nov 2003 |
Keywords
- Adiabatic directional coupler
- Broadband coupler
- Coupled waveguide
- Full coupler
- Optical waveguide theory