Menhir Photonics

Menhir Photonics manufactures ultrafast pulsed lasers with the lowest phase noise and timing jitter on the market. Their products find application in all the research and high-end industrial applications requiring ultra-low phase noise combined with high reliability.

The MENHIR-1550 SERIES is the first femtosecond laser platform at 1550 nm with GHz repetition-rate reaching the industrial quality required by our worldwide customers. It is the best solution for numerous applications where robustness, reliability, low phase noise or ultra-low timing-jitter are of prime importance. These include:

  • Ground- or space-based microwave generation. The timing and noise performance of the MENHIR-1550 is directly transferred to the RF signal.
  • Optical frequency comb. The free-running output of the MENHIR-1550 already demonstrates more than 80 dBc signal to noise ratio, enabling new way of measuring optical frequencies.
  • Photonic analog-to-digital converters. The precise timing of the MENHIR-1550 is used to clock next-generation ADC exploiting sampling in the optical domain, thanks to the high-quality repetition of optical pulses.
  • Dual optical frequency comb for spectroscopy and novel applications. The GHz-level repetition rate of the MENHIR-1550 enables fast spectroscopy with high power per comb line, enabling new generation of spectrometers.

If are involved with low-noise phenomena, then we must have a chat. Contact us at (Click to show email) to discuss about your application and needs, or take a tour to Vescent Photonics booth, our exclusive US distributor.




VREMYA-CH JSC is a private Russian company located in Nizhny Novgorod, a city with developed industry and science, celebrating 800th anniversary in 2021.

Main activities of VREMYA-CH are development and production of high-precision measurement instruments for timekeeping and frequency comparison:

  • active and passive hydrogen masers for ground and space applications;
  • rubidium atomic fountains;
  • frequency comparators, synthesizers, and distribution amplifiers;
  • atomic clock ensemble systems;
  • rubidium oscillators;
  • synchronizing equipment for telecom networks.

VREMYA-CH instruments are used in many national metrological centers around the world. Our active hydrogen masers make a significant contribution to International Atomic Time.

The main staff of VREMYA-CH now is 350 engineers and skilled workers including 15 candidates and doctors of science. Since April 2000 VREMYA-CH has ISO–9002 certificate. VREMYA-CH produces and delivers more than 150 H-masers of different types per year.

Highly qualified specialists, unique technologies covered full production cycle, and over 25 years experience allows reaching excellent metrological precision and continue improving quality of VREMYA-CH instruments.

List of serial products:

Active and passive hydrogen masers: VCH-2021* with ADEV < 1.5e-16 @ 1 day, VCH-1003M (Opt. L), VCH-1008

Rubidium oscillators: VCH-210

Frequency comparators and calibrators: VCH-311, VCH-313, VCH-314, VCH-315(M), VCH-320, VCH-323

Output signal generators and distributors: VCH-604, VCH-605, VCH-606, VCH-317

Telecom synchronization equipment: VCH-001, VCH-002, VCH-003, VCH-1008C, VCH-311C

* Deliveries of VCH-2021 will begin in 2022.

Vescent Photonics

Vescent develops and manufactures novel electronic, electro-optic, and laser technologies serving the optical physics, electrical engineering, and physical & analytical chemistry communities. Our scientists and engineers are continuously developing cutting-edge solutions to technical challenges which allow us to feature a powerful suite of high-bandwidth, low-noise lasers and other photonics tools.

We offer precision, tunable, narrow-band cw diode lasers in both a bench-top format and compact, purpose-specific OEM modules. We are well known for the superior performance of our laser drive and control electronics and accessory electro-optics modules. Working together, they provide primary frequency standards and the photonics front end for many laser-based investigations, including cooling & trapping, quantum sensing, and precision timekeeping. As stand-alone instruments they add performance and value to DYI and 3rd party optical experiments and devices.

Vescent has now introduced a line of self-referenced, octave-spanning frequency comb products based on an all-fiber design. These combs offer the stability required for precision timekeeping, low-noise rf generation, and wavelength calibration where no convenient standard exists. Factory-matched repetition rates of multiple systems enable dual-comb spectroscopy.

Vescent is also the exclusive US distributor for Menhir Photonics, offering their low-phase noise gigahertz mode-locked laser system.

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SAES Group


For over seventy years, SAES Group has been the leading supplier of UHV and XHV solutions based on the Non-Evaporable Getter (NEG) technology for a variety of applications, spanning from consumer electronics up to scientific research areas. These solutions include compact NEG pumps with a large pumping speed for active atmospheric gases and, in particular, hydrogen, without generating vibrations or magnetic fields. SAES NEG pumps are made of reacting metal alloys shaped in the form of highly porous sintered getter disks. The result is an extremely compact, lightweight and high performance Ultra High Vacuum pump featuring extremely high pumping speeds for all the active gas species, like H2, H2O, CO, CO2, N2 and O2. 

In 2011, SAES Group introduced the NEXTorr® pump, a revolutionary product that combines the NEG and sputtering ion pump technologies. NEXTorr pumps are a compact one flange pumping solution for UHV and XHV systems, including basic and applied research applications as well as industrial equipment.

In 2014, SAES group added the CapaciTorr HV pumps to its pump line, extending the benefits of NEG pumping to the high vacuum regime (1×10-9 to 1×10-6 Torr). This unprecedented result for a NEG pump was made possible thanks to the last developed getter alloy, named ZAO®: depending on the needs, the ZAO alloy can be tuned in order to obtain HV, UHV or XHV disks​.

SAES is an innovation driven reality and keeps developing solutions for contributing and supporting the evolution of essential areas for the global community.

Pendulum Instruments

Pendulum Instruments is a global supplier of Test & Measurement solutions for measurement, analysis, simulation, and calibration of time and frequency-related parameters. The company has 60+ years of experience and our products fit the needs of metrology, aerospace and defense, telecom, oscillator manufacturing, RF and Microwave, electronic industries, contract manufacturing, and automotive industries, in around 100 countries worldwide.

Pendulum Instruments currently has offices in Poland, Sweden, China, and the USA, and sales representatives in approximately 100 countries in all continents plus service centres in several countries. We are near you wherever you are, whether you want to buy a new product, get technical support or repair or calibrate an existing product.

lange transparent logo

Lange-Electronic produces GNSS timing generators, time and frequency systems, and a high-precision ensemble clock with a variety of precise timing outputs. We represent Masterclock, Elproma and PikTime in the german speaking area and are Spirent Partner for GNSS and RF test solutions.




TOPTICA develops and manufactures high-end laser systems for scientific and industrial applications. The portfolio includes diode lasers, ultrafast fiber lasers, terahertz systems and frequency combs. OEM customers, scientists, and over a dozen Nobel laureates all acknowledge the world-class exceptional specifications of TOPTICA’s lasers, as well as their reliability and longevity.

Founded in 1998 near Munich (Germany), TOPTICA became one of the leading laser photonics companies by aiming for, and consistently delivering high-end specifications. TOPTICA’s diode lasers are appreciated for excellent coherence, wide tuning range and ideal beam profiles.

TOPTICA's more than 450 employees take pride in developing customized systems. In close collaboration with several universities and institutes, latest scientific discoveries are frequently incorporated into commercial products. With a global distribution network, TOPTICA provides exceptional service worldwide.

SpectraDynamics, Inc.

SpectraDynamics, Inc. (SDI) is a Colorado, USA-based company specializing in high-performance instrumentation for time and frequency applications. SpectraDynamics new product is a cold Rubidium microwave atomic clock (cRb-Clock). Other products include microwave and low noise frequency synthesizers, low noise frequency distribution amplifiers, and optical to RF synthesizers. SpectraDynamics conducts research and development of technology to provide the low noise electronics needed to support atomic time and frequency standards. Our customers include National Time and Frequency Laboratories, Government Agencies, Universities, Department of Defense Contractors, and Telecommunications Companies.

Menlo Systems

Menlo Systems GmbH is a leading developer and global supplier of instrumentation for high-precision metrology. The company with headquarters in Martinsried near Munich is known for its Nobel Prize-winning optical frequency comb technology. With subsidiaries in the US, Japan, and China and a global distributor network, Menlo Systems is closely connected to its customers from science and industry. The main product lines are optical frequency combs, time and frequency distribution, terahertz systems, ultrafast and ultra-stable lasers, and corresponding control electronics. Besides standard production, Menlo Systems develops and manufactures custom made solutions for laser-based precision measurements.

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