OWL Laser Hoots User manual

LH-1310
Operations Guide
Laser High Output Optical Talk Set
(HOOTS)
LH-1550
Date: August 10, 2006
Version 1.3
Laser HOOTS
High Output Optical Talk Set
Singlemode
Operations Guide
Optical Wavelength Laboratories
T
h
e
s
W
e
i
i
s
r
e
o
t
C
a
h
r
o
o
i
c
b
e
a
L
i
n
h
t
O
g
p
n
t
e
i
l
c
e
a
v
l
a
F
i
b
W
e
l
r
a
c
i
T
t
e
p
s
t
O
OWL
5 Commonwealth Ave
Woburn, MA 01801
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

1-1
Laser HOOTS Optical Talk Set
We designed the Laser HOOTS to be economical in order to be sold as an alternative to walkie-talkies.
Optionally, they can be embedded as a permanent part of a fiber network installation. Use it during the
installation for end-to-end voice communications. After installation, leave it attached to a pair of unused fibers
in the patch panel. This way, the Laser HOOTS can be used by communications personnel any time
operations or management functions need to be performed in the fiber cable closet.
HOOTS stands for High Output Optical Talk Set. There are two configurations of the Laser HOOTS: 1310nm
(LH-1310) or 1550nm (LH-1550). The transmitter in the Laser HOOTS also serves as a calibrated -10.0 dBm
singlemode light source. It uses our laser technology to convert your voice into optical signals for full-duplex
voice communications over a pair of singlemode fibers. The Laser HOOTS is a reliable alternative to wireless
communications systems, and is very simple to use. Communications over optical fibers with the Laser
HOOTS offers both security and electromagnetic immunity.
Each Laser HOOTS comes standard with 2 talk set units (one for both ends of the fiber) in a hard-shell
carrying case, and each unit comes with a headset, headset adapter, protective rubber boot, lanyard, 9-volt
battery, and a CD-ROM based operations guide.
General Description
General Features
Laser Transmitter Connector - This port
houses a laser diode that emits a continuous
beam of 1310nm or 1550nm infrared light,
depending upon configuration, that is designed
to couple into singlemode fiber. Connector type
is ST.
Power/Headset Stereo Jack - This stereo jack
serves a dual purpose as both the power switch
and the headset stereo jack.
Receiver Connector - This port houses a
photodiode that receives optical signals from
the transmitter on the opposite end of the fiber
for conversion to voice. Connector type is ST.
Receiver Indicator LED - This LED indicates
the presence of optical pulses used for voice
communications.
Transmitter Indicator LED - This LED
indicates the ON/OFF status of the talk set.
1
2
3
4
5
5
3
2
1
4

to headset
to receive
fiber to transmit fiber
If the fibers are connected correctly, then both the
Transmit and Receiver LEDs will light, and
communications can begin.
You will need a pair of fibers terminated into a
connector at both ends of the link in order to use the
Laser HOOTS. Connect to the transmit and receive
fibers to the talk set connectors (as shown in the figure
at right).
If the LEDs are not lit, double-check to make sure that
the transmit and receive fibers are correctly positioned.
The other end must have its fibers connected opposite
to the other, i.e. the transmit fiber on one end is the
receive fiber on the other.
Connect the headset plug to the headset adapter, then
plug the headset adapter into the headset jack on the
Laser HOOTS.
Operation
headset
adapter
headset
plug
1-2
where: D = talkset distance
R = dynamic range (Laser HOOTS = 20 dB)
To calculate the talkset’s maximum communication distance:
A= typical fiber attenuation at specified 8
D = 20 dB / (0.5 dB/km) = 40 km
Note: the fibers used for communication may be different
than the example above. Consult the fibers data sheet for
its attenuation parameter.
Example (8 = 1310nm, R = 20 dB, A = 0.5 dB/km):
D = R / A
Laser HOOTS Optical Talk Set

Receiver Dynamic Range -10 to -30 dBm
2nm @ 1550nm (LH-1550)
Initial Accuracy +/- .10dB @ 25 C
Spectral Width 2nm @ 1310nm (LH-1310)
Center Wavelength 1310nm +/- 30nm (LH-1310)
Dimensions (each unit) 4.94 x 2.75 x 1.28 in
Source Power -10 dBm into singlemode
NIST traceable 1310nm (LH-1310) or 1550nm (LH-1550)
calibrated wavelengths
1550nm +/- 30nm (LH-1550)
Key Specifications
Laser HOOTS Optical Talk Set
Conforms to the Harmonized European Standards EN 61326-1 and EN 61010-1.
Maintenance and Calibration Procedures
Repair. Repair of this unit by unauthorized personnel is prohibited, and will void any warranty associated with
the unit.
Battery Replacement. The battery compartment is covered by a sliding plate on the back of the unit. One 9v
battery is required for operation.
Cleaning. For accurate readings, the optical connectors on the Laser HOOTS and the connectors on the
patch cords should be cleaned prior to attaching them to one another. Minimize dust and dirt buildup by
replacing the dust caps after each use.
Warranty. The Laser HOOTS comes standard with a two-year factory warranty, which covers manufacturer
defects and workmanship only.
1-3