(a) Can a light emitter without mirrors or any other optical feedback device
produce light by stimulated emission? Is this light coherent?
(b) Explain the significance of the threshold phenomenon in lasers.
(c) Why do confined-field type lasers have lower threshold current and
higher efficency?
(d) Why is the divergence angle of the emitted optical beam much greater in
a semiconductor laser than it is in a gas laser?
Already registered? Login
Not Account? Sign up
Enter your email address to reset your password
Back to Login? Click here