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Coupled optical resonance laser locking.

S C Burd, P J W du Toit, H Uys

|November 18, 2014

Summary

Researchers achieved simultaneous laser frequency stabilization for UV and IR lasers targeting Ytterbium ions (Yb+). This method uses only UV laser absorption, enabling precise control for quantum information and metrology applications.

Area of Science:

Atomic Physics
Laser Spectroscopy
Quantum Information Science

Background:

Precise laser frequency control is crucial for advanced applications like quantum information and high-precision metrology.
Ytterbium ions (Yb+) are key systems for these applications, requiring stabilized lasers for cooling and trapping.
Simultaneous stabilization of multiple lasers to ion transitions presents a technical challenge.

Purpose of the Study:

To demonstrate a novel method for simultaneous frequency stabilization of both UV and IR lasers.
To achieve this stabilization using a single spectroscopic sample and detecting only the UV laser's absorption.
To enable precise laser control for Ytterbium ion applications.

Main Methods:

Simultaneous frequency locking of a 369 nm UV laser and a 935 nm IR laser to coupled transitions in Yb+ ions.

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Utilizing distinct modulation frequencies for each laser and employing lock-in detection on a single photodiode signal.

Generating Yb+ ions within a hollow cathode discharge lamp for the spectroscopic sample.

Main Results:

Successful simultaneous stabilization of the UV and IR lasers to specific Yb+ transitions: (2)S(1/2) → (2)(P(1/2) and (2)D(3/2) → (3)D([3/2]1/2).
Demonstrated a method that requires detection of only the UV laser's absorption to obtain separate locking signals for both lasers.
Achieved stable laser frequencies essential for Yb+ ion manipulation.

Conclusions:

The developed technique provides an efficient method for simultaneous laser frequency stabilization.
This approach simplifies experimental setups by using a single detection channel.
The method is highly adaptable for stabilizing multiple lasers in various ion and neutral atom systems for quantum technologies.