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Menlo Systems GmbH
Am Klopferspitz 19a
D-82152 Martinsried 

Phone +49-89-189166-0
Fax      +49-89-189166-111


Optical fiber links for dissemination of ultra-stable optical clock signals


February, 2014

Optical atomic clocks based on optical so-called “clock” transitions in atoms or ions are extremely stable and accurate and outperform any other clock technique. Timing signals from such clocks are important to improve today’s most demanding experiments from basic research to metrology and telecommunication. Continued development means that these clocks must be compared to other similar clocks for reference.

Optical clocks are complex technical apparatus and are not transportable. Therefore, their signals have been disseminated between the clock labs or towards other users via radio frequency or satellite lines. However, for both approaches the stability and accuracy of the disseminated optical clock signal are strongly reduced.

Optical fiber links capable of disseminating signals without corrupting stability and accuracy provide an exciting solution to this problem.

At Photonics West 2014, Menlo Systems demonstrated optical fiber link technology: all you need is an Optical Frequency Comb from Menlo System (if you don’t have it already), a dark fiber or dark channel in a telecom fiber network connecting the optical clock with the outer world, Menlo Systems’ bidirectional optical amplifiers DUAL EDFA, and an interferometric fiber stabilization. That’s all.

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Image 1: MENLO_Optical-Fiber-Links_pic01_pr.jpg (350 DPI)

Caption: Timing is everything. Connecting optical clocks with Menlo Systems


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Caption: Connecting optical clocks with Menlo Systems’ frequency combs and the bidirectional amplifier DUAL EDFA shown at the Photonics West 2014