Simultaneous channel and OSNR monitoring using a polarization-selective modulator and an LED

Author

Yang, Chun-Liang ; Lee, San-Liang ; Tsao, Hen-Wai ; Wu, Jingshown

Author_Institution

Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan

Volume

16

Issue

3

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

945

Lastpage

947

Abstract

A compact module including a polarization-selective electrooptic modulator and a light-emitting diode (LED) sensor is utilized for optical signal-to-noise-ratio (OSNR) monitoring and channel recognition. The modulator acts as a polarizer and provides signal dithering to improve the detection sensitivity, while the LED is used as a channel sensor. The channel sensor can monitor a wide wavelength range that is rapidly adjustable and can have much relaxed tolerance on temperature control. The combination of a polarization controller/rotator and the polarized modulator can accurately measure the OSNR between 5 and 35 dB with an error less than 0.5 dB.

Keywords

electro-optical modulation; light emitting diodes; modules; monitoring; optical communication equipment; optical fibre networks; optical noise; optical polarisers; optical sensors; optical signal detection; telecommunication channels; LED; OSNR monitoring; channel recognition; channel sensor; detection sensitivity; electrooptic modulator; light-emitting diode; module; optical signal-to-noise-ratio monitoring; polarization controller/rotator; polarization-selective modulator; polarized modulator; polarizer; signal dithering; Electrooptic modulators; Light emitting diodes; Monitoring; Optical modulation; Optical noise; Optical polarization; Optical sensors; Signal to noise ratio; Temperature control; Temperature sensors;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2004.823756

Filename

1269848