Resources Contact Us Home
Excited state polarization altering optical filter

Image Number 5 for United States Patent #5721632.

An excited state polarization altering optical filter includes a vapor cell having a population of electrons with a plurality of energy levels that receive light and transmit light according to the received light. A first pulsed dye laser applies a beam of light by way of a circular polarizer to provide a first beam of light having a first polarization to the vapor cell. The first beam of light causes transitions of the electrons from one energy level to another energy level. A second pulsed dye laser applies a second beam of light with a second, differing, linear polarization to the vapor cell. The vapor cell differentially transmits the first and second beams of light in accordance with the differing polarizations. A delay path is provided for delaying the second beam of light before the second beam of light is applied to the vapor cell. The delay path is tuned by adjusting the length. A third laser applies a beam of light to the first and second lasers. The third laser may be an Nd:YAG laser.

  Recently Added Patents
High pressure refolding of protein aggregates and inclusion bodies
Pharmaceutical composition for treating CAPRIN-1 expressing cancer
Dynamic allocation of access channels based on access channel occupancy in a cellular wireless communication system
Chemically bonded carbon nanotube-polymer hybrid and nanocomposite thereof
Electronic flash device
DNA promoters and anthrax vaccines
System and method for multi-threaded OFDM channel equalizer
  Randomly Featured Patents
Method at gas planing
In-process vision detection of flaw and FOD characteristics
Wall outlet with direct current output
Reproducing apparatus, method for operating reproducing apparatus and non-transitory computer-readable recording medium storing control program
Interference signal supressor system
Bathtub shower curtain leak arrestor
Image processing system using rotatable surveillance camera
CIS based thin-film photovoltaic module and process for producing the same
Icon for a portion of a display screen