Dick Reiley, Sales Manager, Mid-Atlantic Region, Ophir
In nuclear magnetic resonance spectroscopy (NMRS), for example, it is critical to define the size, shape, and intensity of the actual power of the laser source. Measurements need to be made not only at the output of the source, but also at locations along the optical path before the beam is deposited into a cryogenically cooled magnet.
In NMRS, the beam is generated by a microwave synthesizer operating around 12.5 GHz. The output of the synthesizer enters an amplifier stage and then a frequency multiplier chain. The output is converted to 198 GHz. Output is 50 to 60 mW (at the source). The signal can be adjusted across 195 to 201 GHz and is typically operated at CW mode.
The optical path of the source prior to injections into the cryo magnet is complex and signal loss can be expected. Knowing what that loss is, where it exists, and what power is being delivered into the cryo magnet, the final element of the processing state, is essential. Without this information, the expected results will be compromised.