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

Volume

16

Issue

1

fYear

2004

Firstpage

215

Lastpage

217

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.819393

Filename

1256003