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Updated: Jun 6, 2026

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

High-speed terahertz time-domain spectroscopy based on electronically controlled optical sampling.

Youngchan Kim¹, Dae-Su Yee

¹Center for Safety Measurement, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea.

|November 18, 2010

Summary

This summary is machine-generated.

High-speed terahertz time-domain spectroscopy using electronically controlled optical sampling (ECOPS) significantly reduces measurement time. This advanced technique enables faster terahertz pulse characterization compared to traditional methods.

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High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

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Published on: September 22, 2017

Area of Science:

Physics
Spectroscopy
Optics

Background:

Terahertz (THz) time-domain spectroscopy is crucial for material analysis.
Existing methods like asynchronous optical sampling (ASOPS) can be time-consuming.

Purpose of the Study:

To demonstrate a high-speed THz time-domain spectroscopy system.
To improve measurement efficiency using electronically controlled optical sampling (ECOPS).

Main Methods:

Utilized two synchronized Ti:sapphire femtosecond lasers with 100 MHz repetition frequency.
Employed an external offset voltage for rapid time delay sweeping (1 kHz scan rate over 77 ps).
Implemented electronically controlled optical sampling (ECOPS) for THz pulse measurement.

Main Results:

Successfully measured THz pulses with ECOPS, achieving accuracy comparable to ASOPS.
Reduced measurement time by a factor of 50 compared to ASOPS with 100 MHz lasers.
Demonstrated rapid time delay sweeping for enhanced spectroscopic analysis.

Conclusions:

ECOPS offers a significantly faster alternative for THz time-domain spectroscopy.
This method enhances efficiency in THz pulse characterization and analysis.
The technique is suitable for applications requiring rapid spectroscopic measurements.