Tunable wavelength filters with Bragg gratings in polymer waveguides
作者:
Min-Cheol Oh,
Hyung-Jong Lee,
Myung-Hyun Lee,
Joo-Heon Ahn,
Seon Gyu Han,
Hae-Guen Kim,
期刊:
Applied Physics Letters
(AIP Available online 1998)
卷期:
Volume 73,
issue 18
页码: 2543-2545
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.122527
出版商: AIP
数据来源: AIP
摘要:
Tunable wavelength filters are demonstrated based on the thermo-optic refractive index change of the polymer waveguide with Bragg reflection grating. For the low-loss waveguide operating around 1.55 &mgr;m, fluorinated polymers are incorporated. Bragg reflection gratings are fabricated using a phase mask and a high-index polymer. The Bragg reflector exhibits a narrow bandwidth of less than 1.0 nm, a crosstalk of −20 dB, an insertion loss of 3.2 dB, and a flat-top passband. The peak wavelength of Bragg reflection is shifted over 11 nm with a slight insertion loss change. The thermo-optic tuning efficiency is 22 nm/W and the peak shift is linearly proportional to the heating power. ©1998 American Institute of Physics.
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