Coherent Solutions DopplerPXIe, Руководство пользователя

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PXIe Platform Photonic Doppler Velocimetry | DopplerPXIe
Coherent Solutions | 4
3.2 Functional Diagram
Two lasers are connected to the Target Input port and Reference Input ports respectively. The
Target laser passes through a circulator and exits the Probe port. This beam will interact with the
DUT (target) and be reflected into the Probe Port.
The input into the probe port will pass through the circulator and be directed to the optical
attenuator and inline power meter.
The Reference laser passes though an optical attenuator and inline power meter.
The Reference laser and the Probe input are coupled to the Output port through a 10%:90% coupler
respectively.
Through this configuration, independent control of the Probe power and the Reference power is
achieved. The Power Meter is referenced to the output port, so it takes all internal losses of the
optical coupler into consideration when reporting the optical power of the probe and reference.