Why isn there any amplitude modulator for the visible regime?
Unfortunately, we cannot supply an amplitude modulator for the visible regime. The Models 4103 and 4104 amplitude modulators can only be used in the 1-1.6 µm wavelength range. At wavelengths below 1 µm, the lithium niobate crystals used in these amplitude modulators are susceptible to photorefractive damage. Around 633 nm, the Models 4103/4104 cannot be used with more than 1 mW of optical power, or the crystals will be damaged.
