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High Extinction Ratio Widely Tunable Low-Loss Integrated Si3N4 Third-Order Filter

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arxiv 1708.06344 v1 pith:AEO2TVGV submitted 2017-08-21 physics.app-ph physics.optics

classification physics.app-phphysics.optics
keywords integratedextinctionfilterratioseparationdemonstratedelementsfilters
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We demonstrate an integrated continuously tunable third-order ring filter with a measured extinction ratio of 80dB, a 100x improvement over previously demonstrated integrated 3rd or 6th order filters. Using integrated thermal tuning elements, the filter can be tuned over 100% of its 48 GHz free spectral range with 1.3 dB insertion loss. The filters are fabricated on a wafer-scale foundry compatible Si3N4 low-loss platform enabling integration with a wide variety of previously demonstrated passive and active elements. The high extinction ratio, low loss, flat passband and steep roll-off is desirable for a broad range of applications including pump-stokes separation for Brillouin scattering, idler separation in four-wave mixing and separation of entangled states for quantum communications that utilize nonlinear optics.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Integrated Architecture for the Automated Generation and Coil Stabilization of a PZT-Enabled Microcomb

    physics.optics 2025-07 conditional novelty 6.0 of 10

    A single-laser, single-PZT-actuator architecture generates and stabilizes a soliton microcomb against a 16-meter silicon nitride coil resonator, suppressing frequency noise by about 40 dB across a 35 nm comb bandwidth.

  2. Strong nanophotonic quantum squeezing exceeding 3.5 dB in a foundry-compatible Kerr microresonator

    physics.optics 2024-11 conditional novelty 6.0 of 10

    A foundry-fabricated Si3N4 microring produces 3.7 dB of directly detected twin-beam squeezing, consistent with an overcoupling model and implying roughly 10.7 dB on-chip.

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