Laser cavity

Details Laser cavity Laser cavity

2007-01-02

2007-01-02

Menefee, James (Department: 2828)

Coherent light generators

Particular beam control device

Nonlinear device

C372S020000, C372S021000, C372S093000

Reexamination Certificate

active

10282745

ABSTRACT:
A laser cavity comprising a gain medium and first and second end mirrors, wherein the laser cavity further comprises a birefringent material and a mirror arranged to fold light propagating within the laser cavity through a predetermined angle, wherein the predetermined angle is selected such that the reflectivity of the fold mirror is polarisation dependent, and the birefringence of the birefringent material co-operates with the polarisation dependent reflectivity of the fold mirror to form a Lyott filter which suppresses oscillation of unwanted laser modes. The invention allows the construction of a low loss, high finesse laser cavity with longitudinal mode control. The need for introduction of an extra polarisation selection element to form a Lyott filter is removed.

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