Posts

Showing posts with the label microcomb

Ultralow-noise microwave/ millimeter-wave signal generation using a stabilized microcomb-based photonic chip

https://www.eurekalert.org/news-releases/1127576 "as frequency increases signals become more unstable/ exhibit phase noise, optical signals more stable but frequencies too high for electronic circuits... overcome: synchronizing chip-scale microcomb to ultra-stable optical reference making signal 100 million times cleaner/ also using Perfect Soliton Crystal state of light keeping timing jitter at record 3 fs... 6G with more data on same spectrum, ultra-fast, low-latency... compact autonomous vehicle radars distinguishing with higher certainty... mobile atomic clocks, sensors"
Post a Comment
Read more

Simultaneous generation/ electro-optic modulation of frequency combs on thin-film lithium niobate chip mitigates Raman scattering

https://www.eurekalert.org/news-releases/1117192 "normal-dispersion Kerr hybrid microcomb capable of reaching difficult to access spectral bands... rotated racetrack-shaped resonator suppresses interference... requires significantly less power... provides wider line spacing for high-speed telecommunications/ spectroscopic sensors... combs coexist with high-speed electro-optical controls on same mm-scale circuit... miniaturized atomic clocks, gas sensors, and ultra-fast data communication systems" Related: Phonon lasers unlock ultrabroadband acoustic frequency combs https://www.eurekalert.org/news-releases/1117216 A clear roadmap for engineering combs of light https://www.eurekalert.org/news-releases/1120002 1-MHz linewidth VCSELs for high-stability chip-scale atomic clocks https://www.eurekalert.org/news-releases/1120234 Racetrack-shaped lasers developed for bright, stable frequency combs https://phys.org/news/2026-03-racetrack-lasers-bright-stable-frequency.html Topological ...
Post a Comment
Read more

Powerful, energy-efficient, compact, precise, single chip multi-color lasers

https://www.engineering.columbia.edu/about/news/powerful-and-precise-multi-color-lasers-now-fit-single-chip "microcomb source spectrally separates comb lines... enables sending dozens of clean, high-power data stream channels simultaneously... no large/ expensive lasers/ amplifiers... locking mechanism purifies powerful but noisy multimode laser diode, relying on silicon photonics to reshape/ clean up laser’s output, enabling high coherence... wavelength-division multiplexing: dozens of beams in parallel through same fiber... portable sensors, ultra-precise optical clocks, compact quantum devices, LiDAR, data centers" Related: Programmable optical chip merges photons to change color https://phys.org/news/2025-10-programmable-optical-chip-merges-photons.html
Post a Comment
Read more

Self-locked microcomb on a single lithium niobate chip tames Raman scattering to achieve broad spectrum and stable low-noise output

https://phys.org/news/2025-09-microcomb-chip-raman-broad-spectrum.html ">300 nm spectral width, >1,400 comb lines at 26.03 GHz repetition rate... multiple sets of electro-optic/ Kerr/ Raman combs generated, further broadened by 4-wave mixing... comb lines originating from Raman laser self-adaptively phase-locked to comb lines from primary pump light, ensuring high coherence without intervention... 550 kHz (8 MHz through thermal tuning) self-locking tuning range... high-resolution spectroscopy/ measurement, optical communications, quantum information processing"
Post a Comment
Read more

First chip-level free-space terabit/s coherent optical communication links via platicon frequency microcombs

https://www.eurekalert.org/news-releases/1085212 "data transmission rate up to 8.21 Tbit/s, remained stable under turbulence...  no large volume, high power consumption, complex phase synchronized multi-laser arrays... microcombs in free-space links limited by conversion efficiency/ power uniformity issues, overcome through spectral shaping/ efficient energy conversion, based on silicon nitride micro-ring resonator... 1.29 bit/s/Hz spectral efficiency... reduced beam position fluctuations 10X, carrier phase recovery technology... 6G, space-air/ satellite-ground-sea links" Related: Taming the electromagnetic chaos: a smart road-map for future space-air-ground networks https://www.eurekalert.org/news-releases/1109854 Space–ground fluid AI: Paving the way for 6G edge intelligence https://www.eurekalert.org/news-releases/1110941
Post a Comment
Read more

Femtosecond-precise soliton microcomb chips suppress timing jitters for space navigation, lidar, and ultrafast communications

  https://www.eurekalert.org/news-releases/1084768 "no need for large, lab-based lasers... stops jitter (caused by environmental noise/ intracavity power fluctuations) which distorts ultrashort light pulse timing within microresonators, using dispersion-managed silicon nitride microresonators operating at an 89 GHz repetition rate... reduces avoided mode crossings... single-soliton state consistently produced cleanest signal... negligible center frequency shifts, which helps to prevent noise conversion processes related to center frequency shifts... quantum measurement systems" Related: Biomimetic acoustic perception via chip-scale dual-soliton microcombs https://www.eurekalert.org/news-releases/1098635
Post a Comment
Read more

Microcombs could be key in meeting bandwidth demands and reducing energy consumption for artificial intelligence and data centers

https://techxplore.com/news/2025-05-microcombs-key-bandwidth-demands-artificial.html "optical ruler/ frequency microcombs greatly increases bandwidth, generating 100's wavelengths coherently, reliably, stably on single chip, integrated sources for >1 Pbps data transmission... space division multiplexing microcombs communicate at unprecedentedly ultra-high bandwidths and with greatly reduced energy consumption in ultra-small integrated footprint... spectroscopy, metrology, data transmission" Related: Hybrid Kerr-electro-optic frequency combs on thin-film lithium niobate https://www.eurekalert.org/news-releases/1096060
Post a Comment
Read more