Title :
Polarization-insensitive optical sampling system using two KTP Crystals
Author :
Yamada, Nobuhide ; Ohta, Hiroshi ; Nogiwa, Seiji
Author_Institution :
R&D Commun. Project Center, Yokogawa Electr. Corp., Kanagawa, Japan
Abstract :
We have successfully developed a polarization-insensitive optical sampling system with a two-path configuration based on sum-frequency generation (SFG) using two KTiOPO4 (KTP) crystals. The orthogonal polarization components of the signal pulse are optically sampled independently and combined in an avalanche photodiode. The difference in SFG conversion efficiency between each path is compensated by choosing a suitable ratio to divide the sampling pulse. The polarization dependence of the system was less than 3.5% (0.15 dB) in the wavelength range from 1520 to 1620 nm.
Keywords :
optical frequency conversion; optical phase matching; potassium compounds; signal sampling; 1520 to 1620 nm; KTP; KTiOPO4; autocorrelation trace; high temporal resolution; orthogonal polarization components; passively mode-locked fiber laser; polarization-insensitive optical sampling system; signal pulse; sum-frequency generation; temporal resolution; two-path configuration; type-II phase-matching; wavelength sensitivity; Crystals; Fiber nonlinear optics; High speed optical techniques; Nonlinear optics; Optical fiber polarization; Optical mixing; Optical polarization; Optical pulses; Optical sensors; Sampling methods;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.819393
