Picometer Resolution Wavelength Tracking in the $C$-Band Using an InP–InGaAsP Dual-Slab Interferometer

Cassidy, David R.; Cross, Graham H.

doi:10.1109/lpt.2007.899847

IEEE Photon. Technol. Lett.

2007

DOI: 10.1109/lpt.2007.899847

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Picometer Resolution Wavelength Tracking in the $C$-Band Using an InP–InGaAsP Dual-Slab Interferometer

David R. Cassidy

Graham H. Cross

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“…7,8 The interferometer consists very simply of five epitaxial layers of alternately low and high refractive indices ͑here, InP and InGaAsP, respectively͒ fabricated on suitable absorbing layers and on a heavily doped InP substrate ͑see Table I and the inset of Fig. 1͒.…”

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confidence: 99%

Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide

Cassidy

Cross

2007

Applied Physics Letters

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A dual slab waveguide device method for determining the thermo-optic coefficient of waveguide layer materials is demonstrated. Temperature change-induced optical path length imbalance between two single slab waveguide modes provides the primary mechanism for detection. The waveguide mode output field phase change differences are encoded in shifts in the far field interference pattern. To illustrate the method, the thermo-optic coefficients of two In1−xGaxAsyP1−y quaternary alloys, 1.3Q and 1.15Q, are measured at a wavelength of 1.55μm and at a center temperature of 25.2°C. Their ratio is in excellent agreement with previous work, in accordance with optical dispersion models.

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mentioning

confidence: 99%

Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide

Cassidy

Cross

2007

Applied Physics Letters

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Highly sensitive biosensor based on UV-imprinted layered polymeric–inorganic composite waveguides

Wang¹,

Hiltunen²,

Liedert³

et al. 2012

Opt. Express

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An evanescent field sensor utilizing layered polymeric-inorganic composite waveguide configuration was developed in this work. The composite waveguide structure consists of a UV-imprint patterned polymer inverted rib waveguide with a Ta2O5 thin film sputter-deposited on top of the low refractive index polymer layers. The results suggest that the polymer based sensor can achieve a detection limit of 3 × 10(-7) RIU for refractive index sensing and corresponding limit of about 100 fg/mm2 for molecular adsorption detection. Besides enhancing the sensitivity significantly, the inorganic coating on the polymer layer was found to block water absorption effectively into the waveguide resulting in a stabilized sensor operation. The ability to use the developed sensor in specific molecular detection was confirmed by investigating antibody - antigen binding reactions. The results of this work demonstrate that high performance sensing capability can be obtained with the developed composite waveguide sensor.

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Picometer Resolution Wavelength Tracking in the $C$-Band Using an InP–InGaAsP Dual-Slab Interferometer

Cited by 2 publications

References 12 publications

Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide

Universal method to determine the thermo-optic coefficient of optical waveguide layer materials using a dual slab waveguide

Highly sensitive biosensor based on UV-imprinted layered polymeric–inorganic composite waveguides

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