Features

• Includes Electronic Control Tower: Control Units, Phase-Locked Loops, Displays, and Data Acquisition
• Includes Optical Control Unit: Oscillator with PM Fiber Output
• High Repetition Rate
• Includes Amplifier for Octave Generation and Fiber-Coupled f:2f Interferometer
• FC1500-250-WG:
• Designed for Continuous Locking to a Radio Frequency
• FC1500-250-ULN:
• World's Lowest Phase Noise of <100 mrad (100 Hz - 2 MHz) over the Entire Spectrum
• World's Best Stability of 2 x 10^-16 in 1 s, 3 x 10^-18 in 1000 s (Phase Lock to Optical Reference)
• High Bandwidth (>1 MHz) Actuators for Carrier-Envelope Offset (CEO) and Repetition Rate
• Continuous Offset Frequency Tuning Possible
• Designed for Continuous High Bandwidth Laser Locking
• Click Here to View Menlo Systems' Frequency Comb Brochure

Frequency comb technology makes it possible to take direct measurements of absolute, SI referenced, optical frequencies. Menlo Systems' Optical Frequency Combs are flexible, fiber-based, femtosecond frequency comb systems. The laser operation uses Menlo Systems' figure 9^® mode locking technology, which ensures excellent stability and continuous performance. These modules offer simple operation, as the femtosecond laser is ready to use at the press of a single button, and automatic phase lock loops ensure easy stabilization to either an RF or an optical reference. The mature system design with several combined actuators enables long-term operation without the need of adjustment over weeks. With the Extension Packages M-VIS and M-NIR, the system is capable of providing a source for frequency metrology in both the 500 - 1050 nm and 1050 - 2100 nm spectral ranges. A wide range of optional features allows this versatile system to be tailored to customer-specific solutions (see the Optional Packages tab).

The FC1500-250-ULN Ultra Low Noise Optical Frequency Comb combines the versatility and ease-of-use of the standard fiber-based frequency comb systems with minimal phase noise and extreme stability of every comb line. The high bandwidth actuators for both the carrier-envelope offset frequency and the repetition rate guarantees ultimate performance. The system is engineered for long term optical locking without the need of adjustments. The lock is established by a single button push, it keeps itself running using step-free actuators and re-establishes the lock automatically if it is lost. This technology allows for optical locks running over days without a single cycle slip.

Simon Kocur Menlo Systems	Feedback? Questions? Need a Quote? Please note that these Optical Frequency Combs are available directly from Menlo Systems, Inc. within the United States and from Menlo Systems GmbH outside the United States.
	United States Phone: +1-973-300-4490 Email: ussales@menlosystems.com
	Outside United States Phone: +49-89-189166-0 Email: sales@menlosystems.com

Optional Packages to the Base Unit

M-NIR: Extension Package
Extends the stabilized comb spectrum to a range of 1050 - 2100 nm with a free-space output port and >200 mW average power. The measurement port can be optimized independently from the CEO frequency stabilization.

M-VIS: Extension Package
Extends the stabilized comb spectrum to the 500 - 1050 nm range with a free-space output port and >60 mW average power.

HMP High Power Measuring Port
Provides stabilized comb light with highest power at customer-defined wavelengths for high precision measurement of lasers with low power levels (<100 mW). A minimum of 3 mW average power in a 3 nm window is provided at the central wavelength specified by the customer. Available for 1050 - 2100 nm (HMP-NIR) or 525 - 1050 nm (HMP-VIS). The default output is fiber coupled; a free-space option is available. For 390 - 400 nm (HMP-UV), a minimum of 1 mW average power in a 1 nm window is provided, and the output is free space.

P250 PULSE-EDFA: Erbium-doped Fiber Amplifier
All polarization-maintaining (PM) amplifier delievers intense NIR pulses with >350 mW at 1560 nm. Several amplifiers can be added for multiple measurement ports.

M-780 High Power Measuring Port at 780 nm
Output provides stabilized comb light with peak power at 780 nm. Contains an amplifier and subsequent frequency conversion, delivering a minimum of 150 mW average power with a central wavelength in the range of 780 - 800 nm. The default output is free space; a fiber-coupled option is available.

BDU: Beat Detection Unit
Generates and measures the beat signal between the frequency comb and an external continuous wave (CW) laser. Available for various spectral ranges, with free space or fiber-coupled optics, and matched to the customer's laser frequencies.

LLE-SYNCRO: Locking Electronics Unit
Allows locking of an external CW laser to the stabilized frequency comb. Performance has been field tested with lasers from major suppliers.

Microwave Ultrastable RF Output
Ultrastable RF output in the 1 MHz to 10 GHz range. Utilizing a high-sensitivity, high-speed photodetector and a frequency divider where needed.

GPS GPS-Based 10 MHz Frequency Reference
Provides the RF reference input signal for the frequency comb, combining the superior short term stability of an ultrastable quartz oscillator with the long term accuracy of the GPS.

WLM-VIS Integrated Wavelength Meter
Integrated wavelength meter with 100 MHz accuracy in the 500 - 1100 nm range.

WLM-NIR Integrated Wavelength Meter
Integrated wavelength meter with 100 MHz accuracy in the 900 - 1700 nm range.

ORS1500 Optical Reference System
The ORS1500 Optical Reference System consists of a CW laser (1542 nm) locked to a stable high-finesse cavity made of ultra low expansion glass. It offers a very narrow linewidth (<1 Hz) and outstanding short-term stability (<2 x 10^-15 Hz in 1 s). By locking the FC1500-250-ULN to the ORS1500, the purity of this state-of-the-art optical reference can be transferred throughout the entire frequency comb spectrum.

ORS-DL Optical Reference System
The ORS-DL Optical Reference System consists of an external cavity diode laser locked to a stable high-finesse cavity made of ultra low expansion glass. It offers a very narrow linewidth (<1 Hz) and outstanding short-term stability (<2 x 10^-15 Hz in 1 s) at wavelengths such as 657 nm, 689 nm, 698 nm, 729 nm, and many others from 400 nm to 1650 nm. By locking the FC1500-250-ULN to the ORS-DL, the purity of this state-of-the-art optical reference can be transferred throughout the entire frequency comb spectrum.