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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Direct comparison of optical frequency combs using a comb-injection-lock technique.

E B Kim¹, W K Lee, C Y Park

¹Division of physical Metrology, Korea Research Institute of Standards and Science,1 Doryong-Dong, Yuseong-Gu, Daejeon 305-340, Korea.

|July 9, 2008

Summary

This study compares optical frequency combs (OFCs) with different repetition rates using a novel comb-injection-lock technique. The method achieved high-precision frequency agreement, simplifying OFC comparisons.

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Area of Science:

Metrology
Quantum Optics
Laser Physics

Background:

Optical frequency combs (OFCs) are crucial for precise frequency measurements.
Direct comparison of OFCs with different repetition rates is challenging without stable intermediate lasers.

Purpose of the Study:

To demonstrate a direct comparison of two OFCs with differing repetition rates.
To showcase a simplified comb comparison technique using comb-injection-locking.

Main Methods:

Employed a single-mode diode laser for mode selection and amplification of one OFC.
Utilized a comb-injection-lock technique for direct comparison of two Ti:Sapphire mode-locked lasers.

Main Results:

Achieved frequency agreement of 0.019 Hz at 352 THz between the two OFCs.

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Reported an uncertainty of 0.25 Hz (7.1 x 10(-16)), a leading result for microwave-referenced comb comparisons.

Conclusions:

The comb-injection-lock technique enables direct OFC comparison, even with different repetition rates.
This method simplifies experimental setups and broadens the applicability of OFC comparisons.