초록 ▼

A picosecond traveling-wave parametric device capable of controlled spectral bandwidth and wavelength in the infrared is reported. Intense 1.064 m1) pass through a 4.5 cm long LiNbO3 optical parametric oscillator crystal (2) set at its degeneracy angle. A broad band emerges, and a simple grating (3)

A picosecond traveling-wave parametric device capable of controlled spectral bandwidth and wavelength in the infrared is reported. Intense 1.064 m1) pass through a 4.5 cm long LiNbO3 optical parametric oscillator crystal (2) set at its degeneracy angle. A broad band emerges, and a simple grating (3) and mirror (4) arrangement is used to inject a selected narrow-band into a 2 cm long LiNbO3 optical parametric amplifier crystal (5) along a second pump line. Typical input energies at 1.064 mm6) gives 2 mmm

대표청구항 ▼

An apparatus for producing narrow-bandwidth broadly and continuously tunable, picosecond duration, coherent infrared radiation, comprising: (a) means for repetitively producing fixed wavelength, high energy picosecond duration coherent infrared light pulses; (b) means for receiving and dividing said

An apparatus for producing narrow-bandwidth broadly and continuously tunable, picosecond duration, coherent infrared radiation, comprising: (a) means for repetitively producing fixed wavelength, high energy picosecond duration coherent infrared light pulses; (b) means for receiving and dividing said high energy pulses into two parts, and directing each portion along a different pathway, one part along path 1 and the other along path 2; (c) means for generating and emitting picosecond, broad-banded, coherent signal and idler frequencies from amplification of spontaneous noise of the required frequencies, inserted in path 1 and responsive to and using as its source of energy said high energy light pulses; (d) means for receiving and selecting a particular spectral component and a particular spatial component of coherent radiation selected from the group of said emitted coherent signal and idler frequencies; (e) means for receiving, further amplifying and emitting selected spectral-spatial components of said coherent radiation selected from the group of said signal and idler frequencies and regenerating a corresponding idler and signal frequency, respectively, inserted in path 2 and responsive to and using as a source of energy said high energy light pulses; and (f) means for receiving and mixing said amplified selected spectral-spatial components of said coherent radiation selected from the group of said signal and idler frequencies and said regenerated corresponding idler and signal frequencies, respectively, producing and emitting difference frequencies of longer wavelength.