Rapid-scanning terahertz precision spectrometer with more than 6 THz spectral coverage.
نویسندگان
چکیده
We report a terahertz time-domain spectrometer with more than 6 THz spectral coverage and 1 GHz resolution based on high-speed asynchronous optical sampling. It operates at 2 kHz scan rate without mechanical delay stage. The frequency error of the system at 60 s acquisition time is determined by comparing a measured water vapor absorption spectrum to data reported in the HITRAN database. The mean error of 87 evaluated absorption lines is 142 MHz.
منابع مشابه
Time-domain terahertz spectroscopy based on asynchronous optical sampling with femtosecond semiconductor disk laser
A terahertz time-domain spectroscopy (THz-TDS) system using an optically pumped semiconductor disk laser and high-speed asynchronous optical sampling is reported. The combination of these techniques holds considerable promise towards a compact and low-cost implementation of THz-TDS. The spectrometer offers a 333 ps time delay window scanned at 10kHz and delivers more than 1.2 THz spectral cover...
متن کاملA simple terahertz spectrometer based on a low-reflectivity Fabry-Perot interferometer using Fourier transform spectroscopy.
A simple terahertz (THz) Fourier transform spectrometer is theoretically and experimentally demonstrated with a low-reflectivity Fabry-Perot interferometer. Composed with only two parallel low reflectivity surfaces, this simple spectrometer has the ability to measure the spectrum over more than one octave with a controllable resolution. The emission spectra of a wavelength-tunable photonic tran...
متن کاملFiber-based, hybrid terahertz spectrometer using dual fiber combs.
We constructed a fiber-based, hybrid terahertz (THz) spectrometer having two working modes, asynchronous-optical-sampling THz time-domain spectroscopy (AOS-THz-TDS) and multiple-frequency-heterodyning THz comb spectroscopy (MFH-THz-CS), by use of dual fiber-laser-based frequency combs. A spectral range of 2THz and dynamic range of 100 was achieved at the single sweep measurement of 200ms in the...
متن کاملCollective dynamics of lysozyme in water: terahertz absorption spectroscopy and comparison with theory.
To directly measure the low-frequency vibrational modes of proteins in biologically relevant water environment rather than previously explored dry or slightly hydrated phase, we have developed a broadband terahertz spectrometer suitable for strongly attenuating protein solutions. Radiation is provided by harmonic multipliers (up to 0.21 THz), a Gunn oscillator (at 0.139 THz), and the UCSB free-...
متن کاملOptical Pump-Terahertz Probe Spectroscopy Utilizing a Cavity-Dumped Oscillator-Driven Terahertz Spectrometer
A terahertz spectrometer capable of steady-state and time-resolved measurements over the 0.1–3.5-THz spectral region has been built. This spectrometer routinely produces and detects terahertz pulses that exhibit signal-to-noise ratios (SNR’s) greater than 6000 in the time domain and a spectral noise floor of magnitude 2.7 10 . Hence, the spectrometer achieves nearly four decades of dynamic rang...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Optics express
دوره 17 25 شماره
صفحات -
تاریخ انتشار 2009