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Sep 2007
Coherent Inc.Request Info
For Carrier-Envelope Phase Stabilization
SANTA CLARA, Calif., Sept. 21, 2007 -- The new Micra-CEP from Coherent Inc. is a unique system for generating carrier-envelope phase (CEP) stabilized ultrafast laser pulses, the company said.

The system combines its highly flexible and stable broadband ultrafast Micra laser with a carrier-envelope phase detection module and fast feedback electronics, Coherent said. By active feedback control of the laser, the CEP stabilizer locks the phase velocity of the oscillating light field to the group velocity of the pulse envelope. For ultrashort pulses consisting of only a few optical cycles, the peak of the oscillating electric field can be maximized under the pulse envelope.

Coherent-CEP.jpgAt the heart of the CEP module is a nonlinear interferometer. This unit uses a photonic crystal fiber to generate an octave-spanning optical spectrum. The red end of this spectrum is frequency doubled and combined with the green end of this same broad spectrum. The resultant beat frequency is sensed by a fast photodetector that provides the CEP feedback signal. After suitable processing, this signal is then used to control a fast cavity mirror actuator inside the Micra laser and thereby control the carrier phase.

The Micra with CEP stabilizer is a powerful and flexible broadband laser source for the emerging fields of attosecond research, high harmonic generation, optical clocks and coherent control, the company said.

For more information, visit:; e-mail:

Coherent Inc.
5100 Patrick Henry Dr.
Santa Clara, CA 95054
Phone: (408) 764-4000
Fax: (408) 764-4800


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An instrument that employs the interference of lightwaves to measure the accuracy of optical surfaces; it can measure a length in terms of the length of a wave of light by using interference phenomena based on the wave characteristics of light. Interferometers are used extensively for testing optical elements during manufacture. Typical designs include the Michelson, Twyman-Green and Fizeau interferometers. The basic interferometer components are a light source, a beamsplitter, a reference...
A device used to sense incident radiation.
photonic crystal
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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