8 • Operation
NEW FOCUS, Inc.
Connecting the Receiver to the Optical Input
To avoid signal distortion, the optical fiber used to
deliver the optical signal to the photoreceiver should
be single mode at the operating wavelength and the
cable length should be no longer than necessary. If you
have the multimode “-50” model, you can use either
single-mode or 50/125-µm multimode fiber.
1.
Before connecting the photoreceiver, measure the
power in the fiber to ensure it is within the safe
operating range. For a pulsed input, determine the
maximum (peak) power.
You may want to use the New Focus Model
2011-FC 200-kHz Photoreceiver for this purpose;
it has a higher maximum pulse power, and has the
sensitivity to aid in fiber alignment.
2.
Connect the fiber-optic cable to the fiber-optic
input.
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