News, Exhibits, Application Notes

As atomic quantum computing and sensing demand higher operational fidelities, precise lasers are essential, maintaining fractional linewidth and frequency instability below a few parts in 100 trillion (~5×10-14). Ultra-low-expansion (ULE) cavity-stabilized lasers meet linewidth requirements but drift over time affects frequency stability. Traditional reliance on computing/sensing atoms for reference leads to downtime. We propose a dual-reference approach, where cavity-stabilized lasers sync with Vescent’s acetylene optical clock (LTS), reducing reliance on atomic corrections.

Some work requires two lasers to be locked with larger offset frequencies. In

this application note we demonstrate a method for achieving offsets of at least 43 GHz with indications that with the proper equipment the offset could be extended to 100 GHz or more.

We are happy to announce our collaboration with Opton Laser International as our distributor in France.

Vescent and the Danish National Metrology Institute (DFM) announce a highly accurate user-configurable optical clock assembled entirely from their commercially available components achieving 200 femtoseconds (0.0000000000002) timing instabilities at one second and sub nanosecond holdover at one day. Using Vescent’s commercially available, market-leading optical frequency comb (OFC), the FFC-100, to down-convert the clock cycle to the RF and the wavelength-stabilized output of the DFM Stabilaser 1542e as the clock laser, this powerful combination of components (including the Vescent SLICE-FPGA-II) yields a “Box to Clock” in less than 30 minutes (including warm-up time for all three devices), which customers can purchase today in North America for an introductory price of US$199,500 with a current lead-time of 6 to 12 weeks. Vescent is the exclusive Distributor for the DFM Stabilaser 1542e in the US and Canada.

Vescent and the Danish National Metrology Institute (DFM) have demonstrated hydrogen-maser-like performance of an acetylene optical clock assembled by simple integration of the two companies’ commercial-off-the-shelf (COTS) products. A 100 MHz clock output with frequency instability of 2.6x10^(-13)/√τ and a long-term instability reaching 8x10^(-15) around τ = 2,000 s was demonstrated by combining Vescent’s FFC-100 frequency comb with the DFM Stabilaser 1542ϵ optical frequency reference.

We want to shift our focus today from talking about tech to the real force that propels Vescent forward – our extraordinary team!

Learn about our Fiber Frequency Comb, the FFC-100!

A rugged, compact, all-fiber frequency comb, designed and built to provide frequency stability transferable to the SWIR, NIR, visible, and RF spectra.

Fully stabilizable, with fractional Modified Allan Deviation below 10-22, the FFC-100 serves PNT, low-phase noise microwave, field sensing, and quantum security & computing applications in the lab and in the field.

Integrated f(CEO) Phase Noise of 280 mrad RMS in a SESAM-based Frequency Comb Supporting a Fractional Frequency Instability of 1.3x10^(-17) at 1 s

Transferring the Long-Term Stability of a GPS-Disciplined OCXO to Vescent’s FFC-100 Optical Frequency Comb by Repetition Rate Locking

Beat note detection at 895 nm with an EOT detector

The 1 GHz rep rate of a MENHIR-1550 was stabilized.

Nathan Lemke and his students at the Bethel University AMO lab locked a laser to a two-photon transition of rubidium-85. They used the qNimble Quarto as a modulation source, lock-in amplifier, and PI loop filter servo to effect a Pound Drever Hall (PDH) type lock.

Shankar Menon of the University of Chicago won a qNimble Quarto!

Vescent has been awarded a $1.25M Direct-to-Phase II Small Business Innovation Research (SBIR) grant from the Air Force (AFRL, WPAFB) to develop a fully stabilized, multi-gigahertz-repetition rate optical frequency comb (OFC). 

Scott Davis, Vescent CEO will be a panelist on Quantum Computing at the Inside Quantum Technology Meeting in San Diego on Tuesday 10 May, 2022 at 10:45 am PDT.

We demonstrate a lock of a RIO PLANEX 1550nm narrow linewidth laser to the Vescent FFC-100 Fiber Frequency Comb using the Vescent D2-135 Offset Phase Lock Servo.

Upgrading SLICE Products with the Upgrade Utility Version 1.21

Learn how to fine tune the D2-135 phase lock

Load Size Selection and Limiting Factors of the SLICE-DHV’s Modulation Output

The Menhir-1550 laser was used to generate terahertz waves

The APS March Meeting is this week in McCormick Place in Chicago. Visit Vescent at booth 502 in Zone A.

We are raffling off a qNimble Quarto

Locking ƒCEO of a 1 GHz mode-locked laser

Vescent awarded $16.2M ONR contract to develop a Compact Rubidium Optical Clock (CROC)

JILA Atomic Clocks Measure Einstein’s General Relativity at Millimeter Scale

Vescent Photonics has a new website.

ColdQuanta, the quantum atomics company, has been selected by the Defense Advanced Research Projects Agency (DARPA) to develop a scalable, cold-atom-based quantum computing hardware and software platform that can demonstrate quantum advantage on real-world problems. The award is valued at up to $7.4M. Congratulations to our friends at ColdQuanta! Read the full press release here.

Q: What is the phase-noise on my laser beat-note going to look like when locked with the D2-135 Offset Phase Lock Servo (OPLS)? A: There are a lot factors that affect the final lock performance of the D2-135. Like frequency noise, phase noise is measured in terms of a noise density — or noise within