Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Semiconductor optical amplifier suitable for coarse WDM communications and light amplification method










Image Number 18 for United States Patent #7167301.

An active layer contains quantum structures. The active layer amplifies light propagating therein while current is injected therein. Electrodes are provided for sections of the active layer sectionalized along a light propagation direction. The electrodes inject different currents into the sections. Current is supplied to the electrodes in such a manner that a first current density is set to one section of the active layer and a second current density is set to another section. The first current density is lower than that at a cross point and the second current density is higher than that at the cross point. The cross point is a cross point between gain coefficient curves at least two different transition wavelengths of the quantum structures. The curves are drawn in a graph showing a relation between a density of current injected into the active layer and a gain coefficient of the active layer.








 
 
  Recently Added Patents
Optical cable plug-in detection
Milk frother
LED driving circuit, LED illumination appliance, LED illuminator, and LED illumination system
Container pack
Piperazinyl methyl phenyl cyclohexane compound
Driving support device, method, and program
Cover opening and closing unit and image forming apparatus including the same
  Randomly Featured Patents
Vulcanizates containing silica
Remote control antenna rotor system
Process for winding filaments on a mandrel
System and method for communicating between devices
Graded semiconductor layers for reducing threshold voltage for a nitride-based laser diode structure
Method of determining an acquisition indicator bit in a communication system
Eutectic compositions for hot melt jet inks
Clutch
Stringed instrument piezoelectric transducer
Method and structure for providing improved thermal conduction for silicon semiconductor devices