Resources Contact Us Home
Transmission wavelength characteristics variable optical element, and wavelength characteristics variable apparatus, optical amplifier, and optical transmission system, using same

Image Number 17 for United States Patent #7016096.

An object of the invention is to easily realize an optical element using an etalon type structure, capable of changing a periodic transmission wavelength characteristic in an axial direction of transmissivity, and also capable of changing a periodic characteristic with respect to wavelength. To this end, a transmission wavelength characteristics variable optical element according to the invention comprises: a light interference section including a pair of wedge shape magneto-optic crystals arranged with taper faces thereof in close contact, that can change a distance between reflecting films formed on parallel planes of the magneto-optic crystals, by relatively moving the magneto-optic crystals by movable sections, permanent magnets for applying a fixed magnet field to the pair of magneto-optic crystals, an electromagnet for applying a variable magnetic field in a direction different to the fixed magnetic field, and a variable current source controlling the current flowing into the electromagnet.

  Recently Added Patents
Wireless subscriber managing storage of HARQ packets
Fusing apparatus and image forming apparatus provided with the same, and heating apparatus
Optoelectronic devices and a method for producing the same
Dynamically reconfigurable systolic array accelorators
Patterned MR device with controlled shape anisotropy
High power fiber amplifier with stable output
Apparatus for controllable delay cell and associated methods
  Randomly Featured Patents
Scanning electron microscope and method for production of semiconductor device by using the same
Called party response detecting apparatus
Capacitor over bit line structure using a straight bit line shape
Signal processing circuit, interface unit, frame transmission apparatus, and segment data reading method
Method for determining properties of red blood cells
Delivery system and method for interstitial radiation therapy using custom end spacing
Method and apparatus to mirror data at two separate sites without comparing the data at the two sites
Machine for forming cylindrical hay bales
Toner cartridge
Lip balm container