Holography grade lasers are made in almost every color of the rainbow from UV to IR. The most common colors (lines) used for holography are 650nm red (laser diodes), 633nm (Helium-Neon Lasers), 532nm (frequency doubled Yag DPSS lasers), 514nm and 488nm (argon. With an adjustable collimating lens, this 4mW holography diode laser makes it easy to make holograms up to 4"x5" (102x127mm) in size. This is a more visible red wavelength (almost twice as visible as deeper reds at 650nm), and has great response with our LitiHolo 2"x3" and 4"x5" Instant Hologram Film. Thorlabs' Volume-Holographic-Grating- (VHG) Stabilized Lasers are laser diodes that use feedback from a volume holographic grating to provide narrow-linewidth, single-frequency operation. This allows the laser to achieve 15 MHz typical linewidths with an excellent side mode suppression ratio (40 dB. The single most important performance characteristic required when considering lasers for true colour holographic applications, also known as white light holograms, is long coherence length, in addition to good power stability, wavelength accuracy and stability, and, above all, excellent.
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