The detection properties of Fabry Perot laser diodes biased just below threshold are discussed. Responsivity, sensitivity and detector response time are predicted by modifying existing theory for traveling wave laser detectors from Gustavsson . Responsivity is also verified experimentally.
Switching times between transmitting and receiving states are predicted by solving the laser rate equations and the laser turn off time is experimentally verified. It is found that the system switching time is much faster than switching times for other half duplex transceiver systems that have a zero or negative applied bias voltage for detection.
The proposed system is also compared with other configurations for bidirectional optical communication. It is found that a major problem in implementing this proposed system is maintaining a close match of the wavelength dependent responsivity of the receiving laser to the emission wavelength of the transmitting laser.
CONTACTS: Dino Corazza, George Cormack
SUBJECTS: Photonic Networks
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