Beam Sampler SA-209-I-Y-A
When a beam passes through a beam sampler, the high-power main beam continues undisturbed along the optical axis in the zero order. The sampler separates two low-energy side beams, or sampling beams, at a specified fraction of the total energy. They lie to the left and right of the main beam (-1 and +1 orders). The 2 sampling beams are directed to detectors and are characterized by their separation angle and a sampling power ratio specified by the customer. The separation angle is twice the sampling angle (α in the figure). Beam samplers mainly provide real-time monitoring of beam power and can also monitor the beam profile. Sampling ratio and beam angle are generally customized to customer requirements. In simple terms, a beam sampler extracts a fixed fraction of laser energy, commonly from a high-power laser, so total laser energy can be inferred and monitored by measuring the sampled energy, for example in CO2 lasers.
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