Reduction of Second-Order Temperature Dependence of Athermal AWG With Resin-Filled Groove by Pressure Control

In this letter, we have developed a novel technique for improving the temperature stability of an athermal silica-based arrayed-waveguide grating with a resin-filled groove. We compensated for the residual second-order temperature dependence of the passband wavelength using the pressure-induced refr...

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Bibliographic Details
Published in:IEEE photonics technology letters 2009-10, Vol.21 (19), p.1426-1428
Main Authors: Terui, H., Shibazaki, T., Ebisawa, F., Okuno, M., Jinnouchi, Y., Kamei, S.
Format: Article
Language:English
Subjects:
Arrayed waveguide gratings
Arrayed-waveguide grating (AWG)
athermal
Gratings (spectra)
Grooves
Optical fibers
Optical paths
optical planar waveguide components
Optical refraction
Optical variables control
Passband
Photonics
planar lightwave circuit
Pressure control
Reduction
Refractive index
Resins
Spectra
Stability
Temperature dependence
Wavelengths
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Summary:In this letter, we have developed a novel technique for improving the temperature stability of an athermal silica-based arrayed-waveguide grating with a resin-filled groove. We compensated for the residual second-order temperature dependence of the passband wavelength using the pressure-induced refractive index change in a resin inserted into the optical paths. Pressure control under the temperature variation was achieved by using a structure composed of an optical fiber piston and bimetal actuators. We demonstrated that the passband wavelength variation was successfully reduced from 0.080 to 0.025 nm in a -40degC - 85degC temperature range, without any insertion loss increase or spectral change.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2009.2028085