scholarly journals Tunable Room Temperature THz Sources Based on Nonlinear Mixing in a Hybrid Optical and THz Micro-Ring Resonator

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Raju Sinha ◽  
Mustafa Karabiyik ◽  
Chowdhury Al-Amin ◽  
Phani K. Vabbina ◽  
Durdu Ö. Güney ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ring Resonator ◽  
Nonlinear Mixing ◽  
Thz Sources

PROGRESS ON WIDELY-TUNABLE MONOCHROMATIC THz SOURCES AND ROOM-TEMPERATURE DETECTIONS OF THz WAVES

2006 ◽  
Vol 15 (01) ◽  
pp. 89-111 ◽  
Author(s):  
YUJIE J. DING ◽  
WEI SHI
Keyword(s):  
Peak Power ◽  
Room Temperature ◽  
Difference Frequency Generation ◽  
Infrared Laser ◽  
Output Wavelength ◽  
Infrared Laser Beam ◽  
Order Of Magnitude ◽  
Thz Sources ◽  
Thz Waves ◽  
Thz Power

We have further developed widely-tunable monochromatic THz sources. These sources are based on difference-frequency generation (DFG) in GaSe and GaP crystals. Using a 47 mm long GaSe crystal the output wavelength was tuned in the range from 66.5 to 5664 μm (from 150 to 1.77 cm-1) with the peak powers reaching 389 W. This record-high power corresponds to a conversion efficiency of ~0.1%. On the other hand, using a 20 mm long GaP crystal the output wavelength was tuned in the range 71.1–2830 μm whereas the highest peak power was 15.6 W. The advantage of using GaP over GaSe is obvious: crystal rotation is no longer required for wavelength tuning. Instead, one just needs to tune the wavelength of one mixing beam within the bandwidth of as narrow as 15.3 nm. Most recently, we implemented a new scheme for detecting THz waves based on upconversion at room temperature, i.e. by mixing the THz wave with an infrared laser beam, we observed the upconverted signal at a wavelength just slightly longer than that of the infrared laser. To date the detectable THz power is just an order of magnitude higher than that for a bolometer. This scheme allows us to measure the pulse energy density, wavelength, linewidth, and pulse width of a THz beam at room temperature. Using our widely-tunable monochromatic THz beam, we directly measured the absorption spectra of three different families of the homologues of the chemical vapors.

Tunable, Room Temperature CMOS-Compatible THz Emitters Based on Nonlinear Mixing in Microdisk Resonators

2015 ◽  
Vol 37 (3) ◽  
pp. 230-242 ◽  
Author(s):  
Raju Sinha ◽  
Mustafa Karabiyik ◽  
Arash Ahmadivand ◽  
Chowdhury Al-Amin ◽  
Phani Kiran Vabbina ◽  
...  
Keyword(s):  
Room Temperature ◽  
Nonlinear Mixing ◽  
Cmos Compatible ◽  
Microdisk Resonators

Room temperature compact THz sources based on quantum cascade laser technology

2013 ◽  
Author(s):  
Manijeh Razeghi ◽  
Q. Y. Lu ◽  
N. Bandyopadhyay ◽  
S. Slivken ◽  
Y. Bai
Keyword(s):  
Quantum Cascade Laser ◽  
Room Temperature ◽  
Laser Technology ◽  
Quantum Cascade ◽  
Thz Sources

scholarly journals Спектральные характеристики полукольцевых квантово-каскадных лазеров

2020 ◽  
Vol 128 (8) ◽  
pp. 1165
Author(s):  
А.В. Бабичев ◽  
Д.А. Пашнев ◽  
А.Г. Гладышев ◽  
А.С. Курочкин ◽  
Е.С. Колодезный ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Room Temperature ◽  
Ring Resonator ◽  
Radiation Spectrum ◽  
Whispering Gallery Modes ◽  
Ring Resonators ◽  
Lasing Spectrum ◽  
Quantum Cascade ◽  
Whispering Gallery ◽  
Spectrum Width

A half-ring resonator design of a 7-8 μm range quantum-cascade laser with different radius values has been proposed and implemented. For a quantum-cascade laser with a radius of a half-ring resonator of 191 μm, lasing with a radiation spectrum width of 474 nm (82 cm^-1) was demonstrated at low temperatures. The FSR in such lasers was determined by the whispering gallery modes typical for ring resonators. At room temperature, the width of the lasing spectrum was 190 nm (31 cm^–1), which is caused by a decrease in gain and a possible increase in internal losses with increasing temperature. An increase in the cavity radius up to 291 μm made it possible to realize room temperature lasing with whispering gallery modes with a radiation spectrum width of 249 nm (40 cm^-1), by reducing losses on the mirrors.

scholarly journals Planar Microstrip Ring Resonator Structure for Gas Sensing and Humidity Sensing Purposes

Proceedings ◽  
2017 ◽  
Vol 1 (4) ◽  
pp. 414
Author(s):  
Andreas Bogner ◽  
Carsten Steiner ◽  
Stefanie Walter ◽  
Jaroslaw Kita ◽  
Gunter Hagen ◽  
...  
Keyword(s):  
Room Temperature ◽  
Humidity Sensor ◽  
Ring Resonator ◽  
Gas Sensing ◽  
Humidity Sensing ◽  
Resonator Structure ◽  
Zeolite Film ◽  
Microstrip Ring ◽  
Microstrip Ring Resonator

A planar microstrip ring resonator structure on alumina was developed. It was covered with a zeolite film. The device was successfully operated at around 8.5 GHz at room temperature as a humidity sensor. In the next step, an additional planar heater will be included on the reverse side of the resonator structure to allow for testing of gas sensitive materials under sensor conditions.

Sign in / Sign up

Export Citation Format

Share Document