Wavelength demulti/multiplexers with non-sinusoidal filtering characteristics composed of point-symmetrically connected Mach-Zehnder interferometers
✍ Scribed by Yasuhiro Hida; Kaname Jinguji; Norio Takato
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 253 KB
- Volume
- 81
- Category
- Article
- ISSN
- 8756-663X
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✦ Synopsis
Waveguide-type wavelength demulti/multiplexers (WDM) with non-sinusoidal filtering characteristics for optical communication systems are demonstrated using Mach-Zehnder interferometers (MZI) composed of pointsymmetrically connected MZI optical couplers. Three types of WDM, (1) a 1.3/1.55 mm wide-band WDM, (2) a partially-coupled 1.3/1.55 mm wide-band WDM for fiber line testing, and (3) a 1.3 & 1.55/1.65 mm WDM were designed by appropriately setting the wavelength characteristics of the directional couplers and the path differences of the waveguide arms in the MZI-WDMs. These WDMs were fabricated using silica-based planar lightwave circuit technology, and the measured results were in good agreement with the designed characteristics.