High power pumped mid-IR wavelength systems using nonlinear freq

Details High power pumped mid-IR wavelength systems using nonlinear freq High power pumped mid-IR wavelength systems using nonlinear freq

1996-05-17

1999-06-15

Bovernick, Rodney B.

Coherent light generators

Particular beam control device

Nonlinear device

359326, H01S 310

Patent

active

059129107

ABSTRACT:
Laser diode pumped mid-IR wavelength systems include at least one high power, near-IR wavelength, injection and/or sources wherein one or both of such sources may be tunable providing a pump wave output beam to a quasi-phase matched (QPM) nonlinear frequency mixing (NFM) device. The NFM device may be a difference frequency mixing (DFM) device or an optical parametric oscillation (OPO) device. Wavelength tuning of at least one of the sources advantageously provides the ability for optimizing pump or injection wavelengths to match the QPM properties of the NFM device enabling a broad range of mid-IR wavelength selectivity. Also, pump powers are gain enhanced by the addition of a rare earth amplifier or oscillator, or a Raman/Brillouin amplifier or oscillator between the high power source and the NFM device. Further, polarization conversion using Raman or Brillouin wavelength shifting is provided to optimize frequency conversion efficiency in the NFM device.

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