Abstract: A method and apparatus for compensating for temperature characteristics of a laser diode are disclosed. The laser diode may be used in a transmitter unit of a transceiver for optical signal transmission. The transceiver includes the laser diode and a monitor photodiode. In such a method, a modulation current is derived from an input voltage and arbitrary variables. Variations of overall modulation resistance values corresponding to an operation temperature range are evaluated by a relation between the modulation current and the overall modulation resistance, and the overall modulation resistance values are determined according to the variations. Also, variations of overall bias resistance values corresponding to the temperature range are evaluated by a current Impd of the photodiode, which is derived at specific optical power arbitrarily chosen in the temperature range. The overall bias resistance values are determined according to the variations.

Abstract: A fastening apparatus of a pluggable optical transceiver module, which is coupled to an optical connector and electrically connected to a cage assembly, is disclosed. The fastening apparatus includes a module case extending along a longitudinal direction and at least one rotational latch apparatus positioned on both longitudinal lateral surfaces of the module and adapted to be latched for retaining the module. When the module is mounted along the longitudinal direction of the case, it can be released through a seesawing motion about a rotation axis, which is provided in the interior thereof, while pressing in a direction perpendicular to the longitudinal direction.

Abstract: Disclosed is an apparatus and method for linearly controlling the output gain of an optical receiver in an optical communication system. The gain control apparatus includes: a light-receiving device for converting an input optical signal into a current signal and outputting the current signal; a signal detection means for outputting a voltage signal corresponding to intensity changes in the current signal; an attenuation-degree determination means for determining a degree of attenuation of an RF signal restored from the current signal based on the voltage signal; and an amplification unit for amplifying and outputting the restored RF signal. Therefore, a broadcasting signal can be stably provided since the gain of the optical receiver is linearly controlled, and the circuit configuration of the optical receiver can be simplified since the gain of the optical receiver is controlled by a circuit having a relatively simple configuration.

Abstract: A method and apparatus for compensating for temperature characteristics of a laser diode are disclosed. The laser diode may be used in a transmitter unit of a transceiver for optical signal transmission. The transceiver includes the laser diode and a monitor photodiode. In such a method, a modulation current is derived from an input voltage and arbitrary variables. Variations of overall modulation resistance values corresponding to an operation temperature range are evaluated by a relation between the modulation current and the overall modulation resistance, and the overall modulation resistance values are determined according to the variations. Also, variations of overall bias resistance values corresponding to the temperature range are evaluated by a current Impd of the photodiode, which is derived at specific optical power arbitrarily chosen in the temperature range. The overall bias resistance values are determined according to the variations.

Abstract: A fastening apparatus of a pluggable optical transceiver module, which is coupled to an optical connector and electrically connected to a cage assembly, is disclosed. The fastening apparatus includes a module case extending along a longitudinal direction and at least one rotational latch apparatus positioned on both longitudinal lateral surfaces of the module and adapted to be latched for retaining the module. When the module is mounted along the longitudinal direction of the case, it can be released through a seesawing motion about a rotation axis, which is provided in the interior thereof, while pressing in a direction perpendicular to the longitudinal direction.