Oscillator with mode control

Details Oscillator with mode control Oscillator with mode control

H - Electricity

01

S

H01S 3/098 (2006.01) A61F 9/008 (2006.01) H01S 3/08 (2006.01) H01S 5/065 (2006.01) H01S 3/081 (2006.01) H01S 3/106 (2006.01)

Patent

CA 2316004

An oscillator for isolating a transverse electro-magnetic (TEM) zero- zero mode pulsed laser beam includes a laser pumping diode that is mounted on a base to induce a multi-mode laser beam from a lasing medium. As initially induced, the multi-mode laser beam is directed along a path and is characterized by a beating signal which has a frequency that is based on amplitude variations of laser pulses in the multi-mode laser beam. Electronics detect this beating signal and generates a responsive error signal. With closed loop control, the error signal is used to advance a straightedge toward the path of the multi-mode laser beam to remove transverse modes from the multi-mode laser beam with the straightedge. This advancement continues until the error signal is a null and the zero-zero mode pulsed laser beam is thereby isolated.

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