Terahertz radiation source
with optical pump
Description
Terahertz radiation source is a form of electromagnetic radiation within band of frequencies from 0.3 to 10 THz, i.e. 0.3×1012 (1 mm) – 10×1012 Hz (30 μm).
THz radiation has been generated by СО2-laser.
For today, our team developed optically pumped THz source with radiation in spectral range from 73 to 210 μm on a 12 lines of methanol (СН3ОН).
Maximum of pulse power of THz radiation is 124 mW at 118.8 μm (2.52 THz).
Experimental results of generation of THz radiation presented in the table below.
Special technologies Ltd. together with Siberian state medical university, Institute of Laser Physics SB RAS and Institute of Atmospheric Optics SB RAS carry out scientific work for development and creation mobile THz systems for non-invasive diagnostic of bronchopulmonary diseases with use of exhaled air analysis in 2013.
Applications:
— THz spectroscopy;
— molecular structure;
— security and safety monitoring (fingerprint chemical and biological terror materials in packages, envelopes or air);
— communications and networking;
— medicine (dermatology, oral healthcare, oncology, medical imaging);
— quality assurance;
— astronomy and atmospheric research.
Experimental results of generation of THz radiation
| Wavelength of pumping radiation, μm | Average power of pumping radiation, mW | Wavelength of THz radiation, μm | Pulse power of THz radiation, mW |
|---|---|---|---|
| 10.365 (10R4) | 625 | 210 (1.42 THz) | 6 |
| 10.318 (10R10) | 1000 | 192.4 (1,56 THz) | 8.8 |
| 10.274 (10R16) | 1000 | 79.6 (3.76 THz) | 10.4 |
| 10.170 (10R32) | 770 | 155 (1.93 THz) | 14 |
| 10.158 (10R34) | 540 | 128.8 (2.32 THz) | 6.4 |
| 10.136 (10R38) | 390 | 162 (1.85 THz) | 12 |
| 9.694 (9P36) | 580 | 118.8 (2.52 THz) | 124 |
| 9.675 (9P34) | 430 | 73 (4.11 THz) | 3.2 |
| 9.341 (9P8) | 410 | 79 (3.7 THz) | 3.6 |
| 9.329 (9P10) | 480 | 94 (3.19 THz) | 5.2 |
Papers
Starikova M. K., Bulanova A. A., Bukreeva E. B., Karapuzikov A. A., Karapuzikov A. I., Kistenev Y. V., Klementyev V. M., Kolker D. B., Kuzmin D. A., Nikiforova O. Y., Ponomarev Yu. N., Sherstov I. V., Boyko A. A. Noninvasive express diagnostics of pulmonary diseases based on control of patient’s gas emission using methods of IR and terahertz laser spectroscopy // Proc. SPIE 9065, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2013, 906514 (November 28, 2013).
DOI: 10.1117/12.2053144
Experimental set-up
