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Related Experiment Video

Updated: May 27, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Fast, externally triggered, digital phase controller for an optical lattice.

Mark Sadgrove¹, Ken'ichi Nakagawa

¹Institute for Laser Science, The University of Electro-Communication, 1-5-1 Chofugaoka, Chofu, Japan. mark@qo.phys.gakushuin.ac.jp

The Review of Scientific Instruments

|December 2, 2011

Summary

This summary is machine-generated.

We developed a fast optical lattice phase control method with sub-30 μs latency. This technique enables precise manipulation of atomic matter-wave dynamics for advanced quantum applications.

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Area of Science:

Atomic, Molecular, and Optical Physics
Quantum Control

Background:

Optical lattices are crucial for manipulating neutral atoms.
Precise control over lattice phase is essential for coherent atomic matter-wave dynamics.

Purpose of the Study:

To present a novel method for real-time phase control of optical lattices.
To achieve low latency and high precision in optical lattice manipulation.

Main Methods:

Utilized phase-locked digital synthesizers and acousto-optic modulators to control counter-propagating beams.
Implemented a micro-controller with external interrupt for rapid phase updates.
Generated standing waves with a period of 390 nm.

Main Results:

Achieved a latency of less than 30 μs for phase control.
Demonstrated movement of the optical lattice by 49 nm units with a mean jitter of 28 nm.
Phase changes are digitally defined and require no calibration.

Conclusions:

The developed method offers precise and rapid phase control of optical lattices.
This technique is suitable for coherent control of atomic matter-wave dynamics.
The digital nature ensures predictable and calibration-free phase shifts.