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Flexible Polymeric Tunable Lasers for WDM Passive Optical Networks

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4 Author(s)
Kyung-Jo Kim ; Sch. of Electr. Eng., Pusan Nat. Univ., Pusan, South Korea ; Min-Cheol Oh ; Sang-Rok Moon ; Chang-Hee Lee

Flexible polymer waveguide with a Bragg reflection grating is incorporated to form an external cavity laser with a wide tuning range, and it is evaluated as a tunable light source for wavelength division multiplexing optical communication systems. The highly elastic property of polymer materials makes them suitable for producing a tunable Bragg reflector controlled by an imposed strain. The flexible tunable Bragg reflector is installed on a compact moving stage 6 connected to a piezoelectric motor. By applying a total strain of 60680 με (6.07%), wavelength tuning of 82 nm is achieved with a side-mode suppression ratio of 43 dB and a linewidth less than 0.1 nm. The tunable laser controlled by a microactuator exhibits long-term stability with a wavelength fluctuation of less than 0.1 nm. In the optical transmission experiment, various wavelengths are used to transmit the 2.5 Gb/s signal over 50 km, excellent performance was observed with a power penalty of 1 dB compared to the DFB laser.

Published in:

Lightwave Technology, Journal of  (Volume:31 ,  Issue: 6 )

Date of Publication:

March15, 2013

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