What is meant by harmonic generation?
Harmonic generation is a non-linear optical process in which photons of intense incoming laser radiation interact with a non-linear material and radiation with corresponding harmonics frequencies is generated. This typically occurs at optical intensities of the order of 1014 W/cm2 or higher.
What is third harmonic generation?
Abstract: Third harmonic generation (THG) is a nonlinear optical phenomenon which can be applied in diverse research areas including interfacial studies, sub-wavelength light manipulation, and high sensitivity bio-molecular detection.
What is second harmonic generation used for?
Second-harmonic generation is used by the laser industry to make green 532 nm lasers from a 1064 nm source. The 1064 nm light is fed through a bulk KDP crystal.
How does high harmonic generation work?
High harmonic generation (HHG) is a physical effect that occurs when an atomic, molecular, or solid system is placed in a strong driving laser field and emits photons at frequencies of integer multiples of the driving field frequency1,2,3.
What is BBO crystal?
Details. Barium borate (BBO) is a versatile nonlinear crystal, suitable for use in harmonic generation operations, optical parametric oscillators, and in electro-optical applications from the near infrared to the deep ultraviolet.
What is first harmonic generation?
Harmonic generation (HG, also called multiple harmonic generation) is a nonlinear optical process in which photons with the same frequency interact with a nonlinear material, are “combined”, and generate a new photon with times the energy of the initial photons (equivalently, times the frequency and the wavelength …
What is the fourth harmonic?
Fourth Harmonic Nodes occur at locations where two waves interfere such that one wave is displaced upward the same amount that a second wave is displaced downward. This form of interference is known as destructive interference and leads to a point of “no displacement.” A node is a point of no displacement.
What are higher harmonic?
A harmonic is a wave with a frequency that is a positive integer multiple of the fundamental frequency, the frequency of the original periodic signal, such as a sinusoidal wave. The original signal is also called the 1st harmonic, the other harmonics are known as higher harmonics.
What is high order harmonics?
High-order harmonic generation (HHG) is a highly nonlinear process that converts intense low-frequency light into attosecond pulse trains in the extreme ultraviolet (XUV) spectral region.
What is KDP crystal?
Potassium dihydrogen phosphate KH2PO4 (KDP) is a transparent dielectric material best known for its nonlinear optical and electro-optical properties (Refs. 1 and 2). Because of its nonlinear optical properties, it has been incorporated into various laser systems for harmonic generation and optoelectrical switching.
What type is BBO?
BBO is a popular nonlinear optical crystal. Quantum linked photons are producible with beta barium borate. Barium borate is a bactericide and fungicide.
What is high order harmonic generation?
High harmonic generation (HHG) is a non-linear process during which a target (gas, plasma, solid or liquid sample) is illuminated by an intense laser pulse. Under such conditions, the sample will emit the high harmonics of the generation beam (above the fifth harmonic).