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A GaAs injection laser has a threshold current density of 2.5*103Acm-2 and length and width of the cavity is 240μm and 110μm respectively. Find the threshold current for the device.

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A GaAs injection laser has a threshold current density of 2.5*10<sup>3</sup>Acm<sup>-2</sup> and length and width of the cavity is 240μm and 110μm respectively. Find the threshold current for the device.






 
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