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Integrated optical 4×4 star coupler on LiNbO3

Integrated optical 4×4 star coupler on LiNbO3

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Published

A novel low-loss passive planar 4×4 star coupler consisting of four interconnected 3 dB couplers was fabricated on x-cut Ti: LiNbO3 using z-propagation. Almost even distribution was achieved for both TE and TM polarised light incident on any of the four inputs. Excess loss including fibre coupling was <4.2 dB.

Inspec keywords: optical fibres; lithium compounds; optical waveguides; optical communication equipment; integrated optics; titanium; optical couplers

Other keywords: TM polarised light; passive planar configuration; Z-propagation; TE mode; integrated optics; less than 4.2 dB excess loss; optical couplers; optical fibres; optical communication devices; low-loss type; LiNbO3:Ti; single-mode operation; 4×4 star coupler; X-cut

Subjects: Optical communication devices, equipment and systems; Integrated optics; Integrated optics; Optical communication; Fibre optics and fibre waveguides; Optical waveguides and couplers; Fibre optics

References

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      • H. Nakajima , T. Horimatsu , M. Seino , I. Sawaki . Cross-talk characteristics of Ti-LiNbO3 intersecting waveguides and their application as TE/TM mode splitters. IEEE J. Quantum Electron. , 771 - 776
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      • L. Mccaughan . Low-loss polarization independent electro-optical switches at λ = 1.3 μm. J. Lightwave Technol. , 51 - 55
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      • Th. Hermes , J. Saniter , F. Schmidt . Der Aufbau großer, monomodaler Sternkoppler. NTZ , 636 - 638
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      • R.A. Becker , L.M. Johnson . Low-loss multiple-branching circuit in Ti-indiffused LiNbO3 channel waveguides. Opt. Lett. , 246 - 248
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      • M.E. Marhic . Hierarchic and combinatorial star couplers. Opt. Lett. , 368 - 370
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      • S.K. Sheem , T.G. Giallorenzi . Single-mode fibre multiterminal star directional coupler. Appl. Phys. Lett. , 131 - 133
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