Resources Contact Us Home
Mid-infrared fiber laser using cascaded Raman wavelength shifting

Image Number 17 for United States Patent #8036252.

A mid-infrared system for optical probing is disclosed that comprises a mid-infrared fiber laser based on cascaded Raman wavelength shifting, a sample volume, and a detector or detection system. The cascaded Raman wavelength shifting process in optical fibers involves the emission of a plurality of optical phonons for at least some of the pump photonics involved in the process. As one example, using the cascaded Raman wavelength shifting process a pump laser wavelength between 1 and 2 .mu.m can be shifted down to between 2.5 to 10 .mu.m. In one embodiment, the mid-infrared fiber laser comprises a pump laser with a wavelength between 1 and 2 .mu.m, one or more stages of cascaded Raman oscillators implemented in fused silica fiber, and one or more stages of cascaded Raman oscillators implemented in mid-infrared fiber that transmits beyond 2 .mu.m. Examples of mid-infrared fibers include chalcogenides, fluorides and tellurite fibers. The output wavelength from the mid-infrared fiber laser is at an exemplary wavelength longer than 2.5 .mu.m. The mid-infrared optical probing system can be used in applications such as semiconductor process control, combustion monitoring for engines, and defense or homeland security applications such as chemical sensing and infrared counter-measures.

  Recently Added Patents
Method and system for dynamic digital rights bundling
Wireless network device including a polarization and spatial diversity antenna system
Methods and apparatus for map detection with reduced complexity
Biometric data display system and method
Ejection station
Systems and methods for processing supplemental information associated with media programming
Dual use photovoltaic system
  Randomly Featured Patents
Process for producing shape strips of metals
PCRAM memory cell and method of making same
Method of preparing coated cemented carbide product and resulting product
An antiskid frustoconical rim for retrofitting on a butt of a golf club or other device that is swung
Price verifier employing scanner
Image reader
Process for regenerating sulfur sorbent by oxidation and leaching
Device for dispensing radioactive gas
Crosstalk polarity reversal and cancellation through substrate material tuning