A commercial laser diode (Sharp LT026MDO) has the following operating characteristics: Forward Bias 2.4 V Threshold...
Name and briefly discuss 5 of the main advantages of optical fibre over conventional copper coaxial cable for use in communication systems. (5 ma A commercial laser diode (Sharp LT026MDO) has the following operating characteristics: Forward Bias 2.4 V Threshold current 35.1 mA Operating current 50.0 mA Wavelength 788 nm Total radiant flux 4.35 mW c.w. Calculate the efficiency (%) of the laser in terms of the optical power out / electrical power in, the quantum efficiency, QE, and the...
4.32 Laser diode efficiencies Consider a commercial InGaAsP FP laser diode (Mitsubishi ML720 and 725 seriesi operating at ?-1310nm for optical communications. The threshold current is 5 mA. At 1 20mA, the out- put optical power is 5 mW and the voltage across the diode is 1.1 V. Calculate external quantum efficiency (OE), external differential QE, power conversion efficiency, and the slope efficiency of the diode. What is the forward diode current that gives an output optical power of 2...
Problem 2 (25 points) The threshold current of a semiconductor laser is a critical electrical current required for the semiconductor laser to start emitting laser light. Above the threshold current, the output power of a semiconductor laser increases as the electrical current increases. For a semiconductor laser around the wavelength 1.31 micron, the threshold current is 6 mA. When the electrical current increases from 20 mA to 40 mA, the optical output laser increases as thie ron the threshold current...