Patent ID: 7136594

Claim:
An optical communication device comprising: a circuit board having a top surface and a bottom surface; a bench mounted on the top surface of the circuit board; a laser diode (LD) chip mounted on the bench for generating transmitting light signals; a monitoring photodiode (PD) chip mounted on the bench for monitoring power of the laser diode; light guides aligned with the laser diode on the bench for guiding light signals from the laser diode; an LD-driving IC mounted upon the top surface of the circuit board for amplifying transmitting electric signals and giving amplified signal current to the laser diode (LD); an auto power controlling (APC) IC mounted upon the bottom surface of the circuit board for controlling the power of the laser diode in accordance with the power sensed by the monitoring photodiode; and electric elements mounted on the bottom surface of the circuit board, at least one of the electric elements being just below the bench, wherein the light guide is an optical fiber with a ferrule, wherein the bench has a larger V-groove for supporting the ferrule on a lower step, and a smaller V-groove for sustaining the fiber, and marks designating a spot of the laser diode (LD) for aligning the laser diode to the optical fiber, and wherein one of the electric elements on the bottom or the APC IC is mounted below and in opposition to the LD chip through the circuit board and the bench.