Integrated semiconductor laser with electronic directivity and focusing control

A laser optics open air communication system terminal comprising:

• a transmitter integrated semiconductor laser device and a receiver integrated semiconductor laser device, each of the transmitter and receiver semiconductor laser device including a lasing section and an extension chamber, the lasing section having a first end facet and an internal port, and means defining a resonant cavity comprising a first semiconductor material situated between and coupled to the first end facet and the internal port, the extension chamber having a second end facet and means defining an active channel comprising a second semiconductor material situated between and in communication with the internal port and the second end facet, the extension chamber having at least one electrode coupled to the active channel for applying a current to the active channel for injecting a minority carrier density distribution within the active channel for controlling laser light, the receiver semiconductor laser device further including a light detecting diode coupled to the first end facet for detecting an incoming laser beam signal received by the receiver semiconductor laser device, the light detecting diode generating an output signal in response thereto;
• means for amplifying and processing the output signal from the light detecting diode, the amplifying and processing means being coupled to the light detecting diode and generating first and second error signals and a communication signal in response to the output signal from the light detecting diode;
• means for controlling the beam angle and focusing of the receiver semiconductor laser device, the angle and focusing controlling means being coupled to the amplifying and processing means and being responsive to the first and second error signals and providing an output signal in response thereto;
• means for demodulating the communication signal from the amplifying and processing means, the demodulating means being coupled to the amplifying and processing means and the angle and focusing control means, the demodulating means being responsive to the output signal provided by the angle and focusing control means and providing a demodulated communication signal in response thereto;
• and
• means for modulating a communication signal to be transmitted, the modulating means being coupled to the transmitter integrated semiconductor laser device and the angle and focusing controlling means, the modulating means being responsive to the output signal from the angle and focusing controlling means and providing a signal to the transmitter integrated semiconductor laser device for transmitting an output communication laser beam.