Atec Agilent-81624B - Manual (Page 2)

2
Optical power
measurement modules
The Agilent optical power measure-
ment modules provide high perfor-
mance functionality to the Agilent
Lightwave Measurement platform.
These modules can be used with the
mainframes 8163B, 8164B or 8166B
as well as the earlier 816xA models.
Power sensor modules
Provide a front panel optical input
that accepts various 81000xI
connector interfaces for popular
fiber connector types or bare fibers.
Besides giving optical power in
units of W or dBm or dB referred
to a reference, calibrated for any
wavelength in the available range,
these advanced instruments provide
high speed data logging of up to
20 k (100 k for the 81636B) values,
triggered internally or externally.
The min-max function keeps the
maximum and minimum values
continuously or over a chosen
number of samples for simple
determination of power variations.
Averaging times can be set from
10 s down to 100 µs (25 µs for
the 81636B).
Optical heads
Provide a 5 mm diameter detector
area and allow flexible placement
of the power meter which is then
connected to the 81618A or 81619A
interface module in the mainframe.
The functionality is the same as for
the sensor modules and a choice of
adapters allows input from popular
connector types, bare fibers or open
beams. The simple geometry and
high quality detectors allows the
heads to offer the highest accuracy
measurements. Special calibrations,
especially to the 81624B provide
metrology lab reference quality. The
magnetic D-shaped adapters allow
rapid removal and replacement on the
head without twisting attached fibers.
Return loss modules
Use two power sensors and
fiber couplers to provide a direct
measurement of the optical return
loss. One sensor measures the
optical power reflected back to the
instrument while the other monitors
the optical power output from the
instrument. The ratio provides the
return loss. These modules can
use an external light source and
can also be provided with internal
Fabry-Perot lasers for very stable
measurements. Full calibration
functions are available and especially
supported by a built-in application of
the 8163B. Using remote programming,
these can also be configured to log
up to 20 k values from each sensor,
synchronized with a tunable laser
attached to the external input for
making wavelength dependent
measurements.
As with the complete Lightwave
Measurement platform, remote
programming is available with SCPI
commands and especially convenient
using the 816x VXIPlug&Play driver.
This driver especially simplifies power
logging and coordinated measure-
ments with tunable lasers, especially
with multiple power meters.
Selection guidance
• 81635A: dual-channel sensor,
lowest price
• 81634B: most accurate sensor,
high sensitivity
• 81636B: fast power sensor,
100 k points, 25 μs, high
dynamic range
• 81630B: high power sensor
• 81623B: Ge head, general purpose,
also 850 nm specifications
• 81624B: InGaAs head,
highest accuracy
• 81626B: InGaAs head, high power
• 81628B: InGaAs head with
integrating sphere, highest power
and accuracy at high power
www.agilent.com/find/oct
Specifications
Specification
Describes a guaranteed product
performance that is valid under the
specified conditions. Specifications
are based on a coverage factor
of 2 (unless otherwise stated),
corresponding to a level of
confidence of > 95%.
Typical value
A characteristic, describes the
product performance that is usually
met but not guaranteed.
Generally, specifications are valid
after warm-up, after zeroing, in auto-
range mode (if not differently stated)
and at the stated operating conditions
and measurement settings.