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Realization of High-Power Single-Frequency Continuous-Wave Tunable 689 nm Laser.

Jiao Wei1,2, Jingru Qiao1, Pixian Jin1,2

  • 1State Key Laboratory of Quantum Optics Technologies and Devices, Shanxi University, Taiyuan 030006, China.

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Summary
This summary is machine-generated.

Researchers investigated titanium-sapphire (Ti:S) crystal thermal effects to create a high-efficiency 689 nm laser. This tunable laser source is ideal for strontium atomic spectroscopy and ensembles.

Keywords:
high-powersingle-frequencystrontium atomsthermal effect

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Area of Science:

  • Laser Physics
  • Atomic Spectroscopy
  • Materials Science

Background:

  • Titanium-sapphire (Ti:S) lasers are crucial for various scientific applications, but their performance can be affected by thermal effects.
  • Operating a Ti:S laser near its gain edge, specifically at 689 nm, presents unique challenges due to thermal lensing.
  • Precise control over laser parameters is essential for applications like atomic spectroscopy.

Purpose of the Study:

  • To investigate the thermal characteristics of a Ti:S crystal operating near the gain edge at 689 nm.
  • To design and develop a high-conversion-efficiency Ti:S laser operating at 689 nm.
  • To establish a tunable, single-frequency continuous-wave laser source for strontium atom research.

Main Methods:

  • Analysis of the thermal effect of the Ti:S crystal on the laser resonator.
  • Design of a Ti:S laser incorporating thermal effect quantification for precise beam waist control.
  • Implementation of an etalon and piezoelectric transducer (PZT) for frequency tuning and stabilization.

Main Results:

  • A single-frequency continuous-wave 689 nm laser was achieved with 3.65 W output power.
  • The optical-to-optical conversion efficiency reached up to 23.1%.
  • A continuous-frequency tuning range of 17 GHz around 689 nm was realized.

Conclusions:

  • Quantifying thermal effects enables precise control, leading to efficient 689 nm Ti:S laser generation.
  • The developed tunable laser source is suitable for obtaining absorption spectra of strontium atoms.
  • This work presents a promising method for preparing 689 nm laser sources for strontium atomic ensembles.