English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Laser stabilization sits at the heart of many precision scientificexperiments and applications, including quantum information science, metrologyand atomic timekeeping. These systems narrow the laser linewidth and stabilizethe carrier by use of Pound-Drever-Hall (PDH) locking to a table-scale,ultra-high quality factor (Q), vacuum spaced Fabry-Perot reference cavity.Integrating these cavities, to bring characteristics of PDH stabilization tothe chip-scale, is critical to reduce their size, cost, and weight, and enablea wide range of portable and system-on-chip applications. We report asignificant advance in integrated laser linewidth narrowing, stabilization andnoise reduction, by use of a photonic integrated 4.0-meter-long coil resonatorto stabilize a semiconductor laser. We achieve a 36 Hz 1/{\pi}-integrallinewidth, an Allan deviation (ADEV) of 1.8x10^{-13} at 10 ms measurement time,and a 2.3 kHz/sec drift, to the best of our knowledge the lowest integrallinewidth and highest stability demonstrated for an integrated referencecavity. Two coil designs, stabilizing lasers operating at 1550 nm and 1319 nmare demonstrated. The resonator is bus coupled to a 4.0-meter-long coil, with a49 MHz free spectral range (FSR), a mode volume of 1.0x10^{10} {\mu}m^3 and a142 million intrinsic Q, fabricated in a CMOS compatible, ultra-low losssilicon nitride waveguide platform. Our measurements and simulations show thatthe thermorefractive noise floor for this particular cavity is reached forfrequencies down to 20 Hz in an ambient environment with simple passivevibration isolation and without vacuum or thermal isolation. The TRN limitedperformance is estimated to be an 8 Hz 1/{\pi} integral linewidth and ADEV of5x10^{-14} at 10 ms, opening a stability regime that heretofore has only beenavailable in fundamentally un-integrated systems.

36 Hz integral linewidth laser based on a photonic integrated 4.0-meter coil resonator