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.
High Extinction Ratio Widely Tunable Low-Loss Integrated Si3N4 Third-Order Filter
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abstract
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.
fields
physics.optics 1years
2025 1verdicts
CONDITIONAL 1representative citing papers
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Integrated Architecture for the Automated Generation and Coil Stabilization of a PZT-Enabled Microcomb
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.