Wednesday, June 06, 2007

Improvement of the multipass amplifier

In order to protect the crystal, we tried many ways including decreasing the pump energy, walking away the focal point from crystal, reflecting back the pump beam, however the crystal still was burned sometimes. So this time we try to using the second beam to pump from the other side. The second was sent to dump before, now we added three mirrors to steer the beam into the crystal.

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