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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Frequency-agile terahertz-wave parametric oscillator in a ring-cavity configuration
Hiroaki Minamide1, Tomofumi Ikari, Hiromasa Ito
1Advanced Science Institute, RIKEN Sendai, Aramaki Aoba, Sendai 980-0845, Japan. minamide@riken.jp
The Review of Scientific Instruments
|January 12, 2010
Summary
A novel ring-cavity terahertz wave parametric oscillator (TPO) offers fast frequency tuning. This agile terahertz source achieved a wide tuning range and enabled rapid spectroscopic measurements.
Area of Science:
- Optics and Photonics
- Spectroscopy
- Materials Science
Background:
- Terahertz (THz) wave generation is crucial for various spectroscopic applications.
- Existing THz sources often lack rapid frequency agility and wide tuning ranges.
- Ring-cavity configurations offer potential for enhanced optical performance.
Purpose of the Study:
- To demonstrate a frequency-agile terahertz wave parametric oscillator (TPO) using a ring-cavity design.
- To achieve a wide tuning range and fast frequency modulation for THz spectroscopy.
- To verify the performance of the agile ring-TPO by measuring the transmission spectrum of glucose.
Main Methods:
- Fabrication of a three-mirror ring-cavity TPO incorporating a MgO:LiNbO(3) crystal.
- Implementation of a novel fast frequency-tuning mechanism by controlling a cavity mirror.
- Noncollinear phase-matching conditions were employed for THz generation.
- Terahertz spectroscopy was performed by measuring the transmission spectrum of glucose.
Main Results:
- Successful demonstration of a frequency-agile ring-TPO.
- Achieved a wide tuning range from 0.93 to 2.7 THz.
- Obtained the transmission spectrum of glucose within approximately 8 seconds.
- The measured spectrum showed good agreement with results from a Fourier transform infrared spectrometer.
Conclusions:
- The developed ring-TPO provides a powerful and agile source for terahertz spectroscopy.
- The fast frequency-tuning capability significantly reduces measurement times.
- This technology holds promise for advanced spectroscopic analysis in various scientific fields.
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