A polarization splitter on LiNbO/sub 3/ using only titanium diffusion

Tol, J.J.G.M. van der; Laarhuis, J.H.

doi:10.1109/50.85789

Cited by 46 publications

(7 citation statements)

References 15 publications

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“…Polarization splitters have been implemented in LiNbO 3 waveguides [19][20][21]. These schemes were usually based on a Y-branch waveguide configuration (few were based on EO controlled waveguide directional couplers [22]) and can show high polarization extinction ratios (PER) through the creation or engineering of an asymmetric/heterogeneous splitting structure to enhance the modal birefringence [19][20][21]. However, an increased birefringence usually results in an increased dependence of the mode-splitting efficiency on wavelength, limiting the operation bandwidth of the devices.…”

Section: Introductionmentioning

confidence: 99%

Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers

et al. 2019

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We report, to the best of our knowledge, the first broadband polarization mode splitter (PMS) based on the adiabatic light passage mechanism in the lithium niobate (LiNbO 3 ) waveguide platform. A broad bandwidth of ~140 nm spanning telecom S, C, and L bands at polarization-extinction ratios (PER) of >20 dB and >18 dB for the TE and TM polarization modes, respectively, is found in a five-waveguide adiabatic coupler scheme whose structure is optimized by an adiabaticity engineering process in titanium-diffused LiNbO 3 waveguides. When the five-waveguide PMS is integrated with a three-waveguide "shortcut to adiabaticity" structure, we realize a broadband, high splitting-ratio (η c ) mode splitter for spatial separation of TE-(H-) polarized pump (700-850 nm for η c >99%), TM-(V-) polarized signal (1510-1630 nm for η c >97%), and TE-(H-) polarized idler (1480-1650 nm for η c >97%) modes. Such a unique integrated-optical device is of potential for facilitating the onchip implementation of a pump-filtered, broadband tunable entangled quantum-state generator.

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Section: Introductionmentioning

confidence: 99%

Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers

et al. 2019

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“…To date, several approaches have been reported to achieve polarizing waveguides on LiNbO3. These include metallic overlays 1 , proton exchange 2 , proton exchanged portions on Ti indiffused waveguides 3 , TE/TM splitters 4 , Zn diffused waveguides 5 . Each of these methods has its own application specific advantages as well as limitations.…”

Section: Introductionmentioning

confidence: 99%

Ti-indiffused waveguide polarizers on Lithium Niobate for Fiber Optic Gyroscope

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et al. 2018

26th International Conference on Optical Fiber Sensors

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“…Integrated polarization splitters come in two forms: 1, mode-coupling 3 and 2, mode-evolutionbased devices. [4][5][6][7][8][9] Mode-coupling-based devices require phase-matched modes with precisely tuned coupling and are therefore inherently fabrication sensitive and wavelength dependent. Modeevolution-based devices require only that mode coupling be suppressed, a looser requirement that permits more-relaxed tolerances and greater device bandwidths.…”

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confidence: 99%