Title :
Compact all-fiber add-drop-multiplexer using fiber Bragg gratings
Author :
Baumann, Ingolf ; Seifert, Joachim ; Now, Walter ; Sauer, Michael
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. Dresden, Germany
Abstract :
A novel compact all-single-mode fiber add-drop-multiplexer for dense wavelength-division-multiplexing systems is demonstrated. The device consists of a polished fiber coupler with identical Bragg gratings within the interactive length. The multiplexer operation has been theoretically analyzed and calculated transmission and reflection spectra are given. A fabricated prototype device shows good performance, but suffers from a high-insertion loss of 7 dB, which is due to the long but imperfect coupling region and can be drastically reduced in principle. A return loss >30 dB, coupling efficiency=99%, and bandwidth at FWHM /spl Delta//spl lambda/=1.2 mn was measured.
Keywords :
diffraction gratings; multiplexing equipment; optical communication equipment; optical fibre couplers; optical fibre losses; optical fibres; polishing; wavelength division multiplexing; 30 dB; 7 dB; 99 percent; all-single-mode fiber add-drop-multiplexer; bandwidth; compact all-fiber add-drop-multiplexer; coupling efficiency; dense wavelength-division-multiplexing systems; fiber Bragg gratings; high-insertion loss; imperfect coupling region; interactive length; multiplexer operation; polished fiber coupler; reflection spectra; return loss; transmission spectra; Bandwidth; Bragg gratings; Couplings; Fiber gratings; Multiplexing; Optical fiber couplers; Optical fiber devices; Performance loss; Prototypes; Reflection;
Journal_Title :
Photonics Technology Letters, IEEE
