TIA-3000
Optical/Electrical Converter
Terahertz Technologies Inc.169 Clear Road Oriskany NY 13424 (315) 736-3642 FAX (315) 736-4078
Operating Instructions
E-mail sales@terahertztechnologies.com
6/2011
Contents
Introduction.............................................................................................................................................1
Specifi cations.........................................................................................................................................2
Unpackaging and Inspection..................................................................................................................3
Battery Replacement..............................................................................................................................3
Setup......................................................................................................................................................4
Operating Considerations.......................................................................................................................5
Response Curve....................................................................................................................................6
Spectral Response.................................................................................................................................7
Service/Warranty Information.................................................................................................................8
Introduction
The TIA-3000 Optical to Electrical Converter is a convenient high bandwidth detection system for
fi ber optic applications. With a typical bandwidth of DC to 10 GHz, it accurately provides an electri-
cal replica of the optical signal presented to it. It is intended to drive a 50 ohm cable terminated in its
characteristic impedance.
The unit is equipped with an InGaAs/InP detector that is responsive in the wavelength range of 900
- 1700 nm. The TIA-3000 is provided with an FC fi ber optic receptacle. Other fi ber optic connectors
can be provided on request. The output signal is presented to a type K SMA female connector.
Each unit is powered by an external 9 V wall-mount power supply.
Calibration - This is a qualitative measurement device. No calibration is required or necessary.
Unpacking and Inspection
Prior to shipment this instrument was inspected and found to be free of mechanical and electrical
defects. Upon acceptance by the carrier he assumes responsibility for its safe arrival. After unpack-
ing, examine the unit for any evidence of shipping damage. Should you receive this instrument in a
damaged condition, apparent or concealed, it must be noted on the freight bill or express receipt and
signed by the carrier’s agent. Failure to do so could result in the carrier refusing to honor the claim.
Upon fi ling a claim TTI should be notifi ed.
Power Supply
Each unit comes equipped with a 9 V regulated power supply that provides power to the unit. Simply
plug the power supply output cable into the receptacle located beneath the FC fi ber optic connector.
It is recommended that the user never attempt substitution of this unit with any other power
supply. Reverse polarity or voltages other than 9 Volts may irreparably damage the unit.
Page 1
“K” Connector
Typical Setup of the TIA-3000
Model TIA -1200 O/E Converter
Model TIA-3000 O/E
◄
Output
50 Ω
Converter
On
Power
T
T
I
Off
FC Connector
◄
◄
User supplied RF
output cable - 50 OhmΩ
Signal
Warning!
No voltage should be present at user interface or damage to the unit may occur.
Operating Considerations
The TIA-3000 is comprised of a fi ber coupled InGaAs detector coupled with a reverse bias voltage
network and fast transimpedance amplifi er. The output of the unit brought out to a type K female SMA
connector. Light falling on the detector generates a positive-going proportional current. This current,
multiplied by the transimpedance produces a voltage that is proportional to the light incident on the
detector surface.
Normally the unit is used to drive a coaxial cable, this cable should have a 50 ohm characteristic
impedance and be terminated with a 50 ohm load at the oscilloscope or other measuring device to be
used.
The active area of the TIA-3000 is 50 microns in diameter. Standard coupling fi ber is 9μm. Special
orders with 50μm coupling fi ber for use with multimode systems are available.
The TIA-3000 is normally equipped with FC/UPC connectors. Optionally the unit may be ordered with
FC/APC connectors but return loss will be dominated by refl ections from the detector.
Page 2
Typical frequency Response Curve
The bandwidth of the TIA-3000 is from 30 KHz to typically 10 GHz (-3 dB ). Refer to the following Bode plot.
Spectral Response
The approximate relative response curves of the detectors employed is as shown below. Note that
these are representative curves and do not necessarily correspond to the exact response of the par-
ticular detector in use
120
100
80
60
40
Relative Responsivity %
20
800 1000 1200 1400 1600 1800
Wavelength (nm)
Page 3
TIA-3000 Specifications
Detector Type InGaAs/InP (900nm-1700nm)
Current Responsivity 0.8 A / W @ 1550nm Typical
Transimpedance 400 Min. 50 Typ.
Maximum Linear Input Power 2mw
Maximum Input Power w/o Damage 15 mW Peak, 3mW Avg.
Bandwith@1550nm Typ. 11 GHz typ. (8.5 GHz min.)
Output Impedance
Output Connector Type K SMA Female
Fiber Optic Input Connector FC/UPC
Input Numerical Aperture 0.11
Sensitivity -20dBm @ 10
Detector ORL @1550nm Typ. 30dB
Power Requirment 120 VAC, 60 Hz
Dimensions 1.2”W x 2.5”L x 1.3”H ( 30.5mm x 63mm x 33mm)
Weight 5.6 oz (0.16 Kg)
LED Annunciators Provided Power On
Operating Temperature Range 0 - 40 C
Standard Warranty Two Years, Component and Workmanship, 30 Day Satisfaction Guarantee
50 Ohms
-10
BER
Accessories Supplied Transit/Storage Case, Operating Manual, Universal Power Supply
Page 4
LIMITED WARRANTY
TERAHERTZ TECHNOLOGIES INC. (“TTI”) WARRANTS THAT TO THE FIRST PURCHASER, FOR A PERIOD
OF TWO YEARS FROM THE DATE OF RECEIPT, THAT THIS PRODUCT (“THE PRODUCT”) WILL BE FREE
FROM DEFECTS IN MATERIALS AND MANUFACTURING. THE FOREGOING WARRANTY IS THE ONLY
WARRANTY, EXPRESS OR IMPLIED, GIVEN BY TTI, I.E., THERE IS NO WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE. TTI HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OTHER THAN
THE WARRANTY IN THE FIRST SENTENCE TO THE FULLEST EXTENT PERMITTED BY LAW.THE SOLE AND
EXCLUSIVE REMEDY UNDER THIS WARRANTY IS REPAIR OR REPLACEMENT AT TTI’S OPTION OF ANY
PRODUCT THAT PROVES TO BE DEFECTIVE IN MATERIALS OR MANUFACTURING WITHIN TWO YEARS
OF RECEIPT OF THE PRODUCT. NOTE: THIS WARRANTY DOES NOT APPLY TO ANY PRODUCT WHICH HAS
BEEN SUBJECT TO MISHANDLING, MISUSE, OR SERVICE BY UNAUTHORIZED PERSONNEL OR TO ANY
PRODUCT WHICH HAS BEEN DAMAGED, MODIFIED, ALTERED OR TAMPERED WITH.
TO THE FULLEST EXTENT OF THE LAW, TTI DISCLAIMS ALL LIABILITY FOR ANY OTHER DIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES ALLEGED TO BE CAUSED BY A DEFECTIVE PRODUCT, I.E., TTI
WILL NOT BE RESPONSIBLE FOR ANY PERSONAL INJURY, PROPERTY DAMAGE OTHER THAN THE COST
OF REPLACING THE PRODUCT OR ANY OTHER MONETARY DAMAGE SUCH AS LOST WAGES OR PROFITS CAUSED BY ANY USE, ATTEMPTED USE OR INABILITY TO USE THE PRODUCT. NOTE: BY USING THE
PRODUCT, YOU AGREE THAT REPAIR OR REPLACEMENT AT TTI’S OPTION WILL FULLY SATISFY TTI’S
WARRANTY OBLIGATION TO YOU, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR
OTHER APPLICABLE LAW.
Warranty And Repair Information
REPAIR INFORMATION
Products manufactured by Terahertz Technologies Inc. are designed and fabricated to provide
reliable performance. However, in the event that service is required, both telephone technical assistance and factory repair services are available. Call (315) 736-3642 for information.
For IN-WARRANTY REPAIRS, call us to obtain a Returned Material Authorization number,
(RMA Number). All products are to be returned to TTI with freight charges pre-paid. Those
products sent under warranty will be returned to our customers pre-paid. We cannot be responsible for returned products that do not reference the TTI RMA number.
For OUT-OF-WARRANTY repairs, services are billable for both time and materials.
Calibration - This is a qualitative measurement device. No calibration is required or necessary.
Page 5
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