Patent ID: 7042919
Filing Date: 2006-05-09
Classification: H01S

Abstract:
1. A pumping module for making laser light pass through square rods each having a couple of heat sinking surfaces opposite to each other and shaped like a square pillar so as to provide a gain for the laser light, said pumping module comprising: a first square rod group including a first square rod having an optical axis and having a couple of heat sinking surfaces normal to a first axis perpendicular to said optical axis and a second square rod having said optical axis in common with said first square rod and having a couple of heat sinking surfaces normal to a second axis perpendicular to said optical axis and said first axis; a second square rod group including a third square rod having said optical axis in common with said first square rod and having a couple of heat sinking surfaces normal to said first axis and a fourth square rod having said optical axis in common with said first square rod and having a couple of heat sinking surfaces normal to said second axis; and a 90-degree polarization rotator disposed between said first and second square rod groups and having said optical axis in common with said first through fourth square rods, for rotating a polarization of said laser light passing therethrough by 90 degrees.