Title :
Magnetic field rotating-type Faraday polarization controller
Author :
Saitoh, Takanori ; Kinugawa, Shigeru
Author_Institution :
Res. Lab., Anritsu Corp., Kanagawa, Japan
Abstract :
We developed a new polarization controller based on the Faraday effect. The transmittance fluctuation was suppressed to less than 0.03 dB by controlling the direction of a magnetic field with a magnitude exceeding the saturation field of Faraday elements. Because it has no mechanical parts, the new polarization controller can perform polarization control with high reproducibility and high-speed polarization control of better than 10/sup 3/ turns/s on a Poincare sphere. The new polarization controller has a rotatory polarization angle setting accuracy of /spl plusmn/5/spl deg/ and a reproducibility of /spl plusmn/0.3/spl deg/ on the Poincare sphere.
Keywords :
Faraday effect; magneto-optical devices; optical communication equipment; optical fibre dispersion; optical fibre polarisation; optical variables control; Faraday effect; Faraday element saturation field; Poincare sphere; high reproducibility; high-speed polarization control; magnetic field rotating-type Faraday polarization controller; polarization controller; polarization-mode dispersion; reproducibility; rotatory polarization angle setting accuracy; transmittance fluctuation suppression; wavelength-division-multiplexing systems; Communication system control; Electromagnets; Flexible printed circuits; Magnetic fields; Optical control; Optical fiber polarization; Optical polarization; Optical saturation; Optical scattering; Saturation magnetization;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818245
