Title :
Nonreciprocal circuit for laser-diode-to-single-mode-fibre coupling employing a YIG sphere
Author :
Sugie, Toshiharu ; Saruwatari, M.
Author_Institution :
NTT Yokosuka Electrical Communication Laboratory, Yokosuka, Japan
Abstract :
A compact nonreciprocal optical circuit for laser-diode-to single-mode-fibre coupling using a YIG sphere is proposed in the 1.3 ¿m wavelength region. It is clarified that the YIG sphere can function as an effective Faraday rotator as well as a coupling lens. A high isolation value of more than 30 dB has been realised with coupling efficiency of ¿5.2 dB for a single-mode fibre.
Keywords :
magneto-optical effects; optical couplers; optical fibres; semiconductor junction lasers; 1.3 micron; Faraday rotator; YIG sphere; laser-diode-to-single-mode-fibre coupling; nonreciprocal optical circuit;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19820703
