A GaAs injection laser has a threshold current density of 2.5*103Acm-2and length and width of the cavity is 240‚âà√≠¬¨‚à´mand 110‚âà√≠¬¨‚à´m respectively. Find the threshold current for the device.$#

A GaAs injection laser has a threshold current density of 2.5*103Acm-2

1.	A GaAs injection laser has a threshold current density of 2.5*103Acm-2and length and width of the cavity is 240‚âà√≠¬¨‚à´mand 110‚âà√≠¬¨‚à´m respectively. Find the threshold current for the device.$#
A.	663 mA
B.	660 mA
C.	664 mA
D.	712 mA
Answer» C. 664 mA