CrystaLaser manufactures compact single longitudinal mode red laser systems with long coherence length >5 meters in the USA.
They are suitable for hologram application. The laser is linear polarized in vertial direction.
The laser beam is about 1 mm with 1 mrad full angle divergence, circular beam.
Red laser model
DL660-030-S, a >= 30 mW, Pure single frequency laser, 660 nm, coherence length is >5 meters with wall-plug power supply.
Red laser model
DL640-050-S, a >= 50 mW, Pure single frequency laser, 640 nm, coherence length is >5 meters with wall-plug power supply.
Please provides promotion code "Holo-red-0912" to get a discount price. This promotion will end on Dec 18, 2009.
The red laser is easy to operate and much better in coherence length than He-Ne laser.
CrystaLaser also manufactures 532 nm green laser with long coherence length of >300 meters.