Thermal lens spectrometry using a broadly tunable optical parametric oscillator.

Area of Science:

• Spectroscopy and Spectrometry
• Optical Physics
• Laser Technology

Background:

• Optical parametric oscillators (OPOs) are crucial for generating tunable laser light.
• Existing OPO systems may have limitations in tuning speed or range.
• Precise wavelength control is essential for advanced spectroscopic applications.

Purpose of the Study:

• To introduce a novel computerized optical parametric oscillator (OPO) with broad, continuous tunability.
• To enable rapid and direct access to any selected wavelength within the OPO's tuning range.
• To demonstrate the system's versatility in complex spectroscopic measurements.

Main Methods:

• Development of a computerized optical parametric oscillator system.
• Implementation of continuous wavelength tuning capabilities from 420 nm to 2 µm.
• Utilizing the system for spectroscopic analysis, including thermal lens measurements.

Main Results:

• The computerized OPO achieves continuous tuning across a wide spectral range (420 nm - 2 µm).
• The system allows for direct and rapid selection of specific wavelengths.
• Successfully measured the complete visible thermal lens spectrum of nitrogen dioxide (NO2) via continuous scan.

Conclusions:

• The presented computerized OPO is a versatile and efficient tool for spectroscopic and spectrometric applications.
• Its broad tuning range and rapid wavelength access enhance experimental capabilities.
• The system's performance is validated through the comprehensive spectral analysis of NO2.