LS-1310/1550
Laser Source
2
Specifications
Accuracy is specified for a period of one year after
calibration, at 18 °C to 28 °C (64 °F to 82 °F) with
relative humidity to 90%. Specifications are shown
in Table 1.
Table 1. Specifications
Emitter Type
Laser
Laser
Classification
Class 1
Safety
Complies with ANSI/ISA S82.01-
1994, CSA C22.2 No. 1010.1-92,
EN61010.1: 1993
Output
Wavelengths
1310 nm
±
20 nm
1550 nm
±
30 nm
Output Connector
Singlemode ST
Output Power
(CW)
-10 dBm (100
µ
W) adjustable
Output Level
Stability
At 25
°
C after a 15-minute
warm-up:
±
0.2 dB over 1 hour
±
0.4 dB over 8 hours
Temperature
Range
Operating: 0
°
C to 40
°
C
Storage: -10
°
C to +60
°
C
Power Source
9 V battery
Size
17.4 cm x 7.6 cm x 3.8 cm
(6.9 in x 3.0 in x 1.5 in)
Weight
266 g (9.38 oz)
Battery Life
16 hours typical (alkaline)
Indicators
SOURCE ACTIVE (power on)
LED
LOW BATTERY LED
Cleaning the Optical Connector
Most problems with optical sources result from
contaminated connectors. Therefore, always clean
the connector before troubleshooting or calibration.
To clean the source connector, wipe it gently with
an optical-grade tissue or swab dampened with
optical-grade alcohol. To remove loose dirt and
dust from the connector, use filtered, compressed
air.
Always cover the connector with a dust cap when
the unit is not in use.
Required Equipment
The following equipment is required for
performance tests and calibration adjustments:
•
Fiber optic power meter calibrated at 1310 nm
and 1550 nm
•
0-10 V dc adjustable power supply with a
minimum output of 500 mA and a current-limit
adjustment
•
Fluke 187 DMM (digital multimeter),
equivalent, or better
•
20 MHz digital or analog oscilloscope,
equivalent, or better
•
Optical power meter (OPM) traceable to local
national standards
•
ST/ST singlemode fiber patch cable
Note
Using a multimode fiber patch cable will
cause calibration errors.
Performance Tests
Use the performance tests to confirm that the
source is working properly. If the source fails any
of these tests, clean the fiber connectors, verify that
the connections are solid, then retest the laser
source. If the source still fails a test, it needs
calibration adjustments or repair.
1.
Turn on the optical power meter (OPM).
2.
Set the laser source's power switch to 1310 nm.
Verify that the
LOW BATTERY
LED flashes
briefly before the
SOURCE ACTIVE
LED turns
on. Let the laser source stabilize for 5 minutes.
3.
Using a singlemode fiber patch cable, connect
the laser source to the OPM.
4.
Set the OPM to measure 1310 nm. Set the laser
source's
CW/MOD
switch to
CW.
5.
Verify that the power reading is -10.00 dBm
±0.5 dB.
6.
Set the laser source’s CW/MOD switch to
MOD. Verify that the power reading increases
by 0.6 dBm +0.3 dB.
7.
Set the laser source's
CW/MOD
switch to
CW
;
set the power switch to 1550 nm. Set the OPM
to measure 1550 nm.
8.
Repeat steps 5, 6, and 7.
9.
Turn off the laser source. Disconnect the fiber
patch cable; then install the dust caps on the
source.