New Focus 1621, Руководство пользователя

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Nanosecond Photodetectors Operation • 5
Operation
Introduction
The Model 162X is a general-purpose battery-powered
photodetector for measuring optical signals down to
nanosecond time scales.
There are two versions of the Model 162X detector,
each based on a different photodetector diode:
Complete specifications for the Model 162X nanosecond
photodetectors begin on page 17.
This product is ideal for detecting light pulses or
monitoring optical signals from DC to several
hundred MHz where an electronic amplifier is not
required. The large-diameter detectors and the DC
response make alignment and operation of the Model
162X easy. Figure 1 shows the typical responsivity
curves for the photodetectors used in the Models 1621
and 1623.
Model Wavelength Type Diam.
1621 350–1000 nm silicon/PIN 0.8 mm
1623 800–1700 nm InGaAs/PIN 0.1 mm (with
a 1.5-mm
ball lens)
Note: Note:
162x nanosec revB.fm Page 5 Friday, August 17, 2001 5:51 PM