Prospective THz Gyrotrons for High-Field Magneto-Resonance Spectroscopy

A high-harmonic Large Orbit Gyrotron and a low-voltage gyrotrino placed inside a spectrometer cryomagnet enable greatly simplify terahertz systems for magneto-resonance spectrometers. Large Orbit Gyrotrons provide a powerful third-harmonic generation at frequencies of 1 THz and 0.394 THz in pulsed and CW regimes, respectively, at significantly lower magnetic fields than conventional gyrotrons. According to simulations the gyrotrino with the voltage of 1.5 kV and frequency of 0.264 THz can generate a power of tens of watts; a possibility to operate at such a low voltage is demonstrated in the existing gyrotron with three-electrode magnetron-injection gun.

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Third-harmonic generation in cylindrical parabolic quantum wires with static magnetic fields

Physica B Condensed Matter ◽

10.1016/j.physb.2007.08.003 ◽

2008 ◽

Vol 403 (1) ◽

pp. 37-43 ◽

Cited By ~ 39

Author(s):

Guanghui Wang ◽

Qi Guo

Keyword(s):

Magnetic Fields ◽

Harmonic Generation ◽

Quantum Wires ◽

Third Harmonic Generation ◽

Static Magnetic Fields ◽

Third Harmonic

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Second and third harmonic generation associated to infrared transitions in a Morse quantum well under applied electric and magnetic fields

Infrared Physics & Technology ◽

10.1016/j.infrared.2017.06.005 ◽

2017 ◽

Vol 85 ◽

pp. 147-153 ◽

Cited By ~ 12

Author(s):

R.L. Restrepo ◽

E. Kasapoglu ◽

S. Sakiroglu ◽

F. Ungan ◽

A.L. Morales ◽

...

Keyword(s):

Magnetic Fields ◽

Quantum Well ◽

Harmonic Generation ◽

Third Harmonic Generation ◽

Third Harmonic ◽

Electric And Magnetic Fields

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Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽

10.3390/ma14123194 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3194

Author(s):

Adrian Petris ◽

Petronela Gheorghe ◽

Tudor Braniste ◽

Ion Tiginyanu

Keyword(s):

Harmonic Generation ◽

Nonlinear Optical ◽

Laser Pulses ◽

Third Harmonic Generation ◽

High Repetition Rate ◽

Third Order ◽

Third Harmonic ◽

The Third ◽

High Repetition ◽

Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

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