Reduction of carrier envelop phase noise by stabilizing f-to2f interferometer

Reference Number: K 06-20

Inventors: Chang, Zenghu; Chengquan, Li; Moon, Eric; Zuoliang, Duan

Owner: Kansas State University Research Foundation

USPTO Link:

Invention Summary

Carrier-Envelope (CE) phase is a very important parameter affecting the outcome of many strong field processes, such as attosecond pulse generation and above threshold ionization (ATI). Stabilization of the CE phase is also extremely important for optical frequency metrology and optical clocks.

Advantages

With the stabilization turned on, the dominating noise peak at ~ 100 Hz was reduced by more than two orders of magnitude. Evaluating f-to-2f interference at ~ 100 Hz, the integrated phase was reduced to ~ 1mrad even for the 100 second observation time, compared to that without the stabilization, when the integrated error reaches 0.6 radians in 10ms.

Currently, existing similar products in the market have two major problems:

• They do not stabilize the f-to-2f interferometer or

• They use oscillators with very broad (close to an octave) spectral bandwidth, however, are extremely expensive.

Both problems are solved by this innovative invention.

Applications

• Mach-Zehnder f-to-2f interferometer;

• Other configurations of f-to-2f interferometer.