Laser with Multiple Gain Elements Pumped by a Single Excitation Source.
Patent, Filed 31 Oct 94, patented 30 Jul 96,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A laser produces laser emission at two or more wavelengths simultaneously. The laser includes at least two gain elements, and each gain element generates a different wavelength. A single optical pumping source is used for optically exciting all laser gain elements contained within the laser resonator cavity. A wavelength dispersing element such as a prism is disposed in the laser resonator cavity for dispersing the wavelengths operating simultaneously within the laser resonator cavity and to create separate regions for each laser gain element. Laser gain elements may be tunable laser gain elements or discretely emitting laser gain elements. Arbitrarily large wavelength separations between the wavelengths operating simultaneously may be achieved in this manner to produce stable cw or pulsed output, which may be Q-switched or line narrowed. Intracavity sum frequency generation can he produced efficiently by using a non-linear sum frequency generating crystal disposed at a laser resonator cavity waist. The multiple gain elements may be of different materials or the same material.
- Lasers and Masers