Resources Contact Us Home
Optical FM source based on intra-cavity phase and amplitude modulation in lasers

Image Number 17 for United States Patent #7907648.

A laser is disclosed including a gain section having a distributed feedback grating imposed thereon. An absorption section is embedded in the gain section such that the first and second portions of the distributed feedback grating extend on either side of the electro-absorption section. A controller imposes a substantially DC bias signal on the first and second gain electrodes and imposes a modulation signal encoding digital data on the modulation electrode to generate a frequency modulated signal. In some embodiments, the first and second portions are biased above the lasing threshold and the absorption section is modulated below the lasing threshold to modulate loss in the absorption section.

  Recently Added Patents
Method for identifying bacteria in a sample
Image forming apparatus with enhanced display of guidance information
System for programming domestic appliances and method for programming assembly-line programmable domestic appliances
Compact light shield for flash photography
Multi-channel memory system including error correction decoder architecture with efficient area utilization
Concentration measuring apparatus for hydrogen sulfide in gas flow, and method for determining sulfide ion
Electronic device
  Randomly Featured Patents
Timepiece with multifunctional member
Steering valve for hydrostatic drive
System for providing continual drainage in negative pressure wound therapy
Portable electronic apparatus with battery engaging terminal
Lane detection apparatus
Tandem time-of-flight mass spectrometer with delayed extraction and method for use
Separation of 2,7 diisopropylnaphthalene from a feed mixture comprising various diisopropylnaphthalene isomers with a zeolite adsorbent
Gyroscopic virtual counterweight for cranes
Foam laminate for mold in place seating component
Liquid flow control devices particularly useful in infusion administration sets