Two detection techniques of broadband terahertz (THz) time-domain spectroscopy-THz air-biased coherent detection (THz-ABCD; from 0.3 to 14 THz) and electro-optical (EO) detection (from 0.3 to 7 THz) - are both performed at several different relative humidity levels. The THz power exponentially decays with the increase in relative humidity. The dynamic range of the main pulse in the time domain linearly decreases as the relative humidity increases from 0% to 40%, and linear fittings show that the slopes are -0.017 and -0.019 for THz-ABCD and EO detection, respectively. Because of the multiple reflections caused by the crystal in the common EO detection, THz-ABCD has better spectral resolution (17 GHz) than that of EO detection (170 GHz). The spectrum of water vapor absorption measured by THz-ABCD is also compared with that measured by the Fourier transform infrared spectroscopy (FTIR).

© 2012 Chinese Optics Letters

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

Related Journal Articles

• Observation of the waveform of accumulated photon echoes in a dye-doped polymer film by use of an interferometer (JOSAB)
• Picosecond Investigation of the Collisional Deactivation of OH A ²Σ⁺(v′ = 1, N′ = 4, 12) in an Atmospheric-Pressure Flame (AO)
• Monitoring the ultrafast electric field change at a mid-infrared plasma Bragg mirror (OL)
• Characterization of a supercontinuum generated from a photonic crystal fiber and its application to coherent Raman spectroscopy (OL)
• Noncollinear phase matching in fluorescence upconversion (OL)

Related Conference Papers

• Wideband gas sensing using long path THz spectroscopy
• Two-dimensional spectroscopy by spectrally resolved real-time resonant coherent Raman scattering in polydiacetylene
• Ultrafast light induced charge disordering around phase transition temperature in 2D spin ladder compound NaV2O5
• Structural dynamics in water probed by heterodyne-detected photon echo
• Temperature-Dependent Transparency Conditions and Spatial Degeneracy in Self-Organized Quantum Dots