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
SMS transport resource control
Generator with a segmented stator
Light emitting diode having multi-cell structure and method of manufacturing the same
Computerized on-board system for controlling a train
Signal phase-based location of network nodes
Asynchronous task execution
High electron mobility transistor and manufacturing method thereof
  Randomly Featured Patents
Pulse oximeter with probe difference compensation
Method and device for decorating containers
Device using a pneumatically-actuated carrier to eject projectiles along a trajectory
Management system for processing streaming data
Cymbal clamp
Cover for a wall-mounted packaged terminal air conditioning (PTAC) unit
Method and apparatus for undoing a data migration in a computer system
Power semiconductor device and method therefor
Combined storage and mixing bottle