TTI TIA-4000 User manual

Features:
• Wavelength Response 950 nm to 1650 nm
• Low Noise, High Gain
• Gain Settings from 2 to 7
• Bandwidth 30 KHz to 7 GHz typical
• SMAtype K Output Electrical Connector
• FC/APC Style Fiber Optic Input Connector
Made In the USA ©10/2014 Terahertz Technologies Inc.
Optical to Electrical Converter
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0The TIA-4000 is comprised of a fiber coupled InGaAs APD detector combined with a variable reverse bias
voltage network and fast transimpedance amplifier. 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-4000 is 30 microns in diameter. It is coupled to a single mode optical fiber. Typical
optical return loss is 52 dB and is caused primarily by the FC/APC connector employed.
The applied bias voltage controls the gain of the APD. This voltage in turn, is controlled by means of the two
push buttons on the top panel. The rightmost button increases the gain and the leftmost button decreases the
gain. There are 64 discrete gain settings that are retained in non-volatile memory when the power is turned off.
Thus the gain setting will be retained even though power is disconnected from the unit.
Pressing a button once causes the unit to advance in the selected direction by one step. Holding the button
down causes the unit to advance automatically until a limit is reached.
Operation Notes:
1: To avoid damaging the detector, the gain must be set to the lowest setting prior to turning off the TIA-4000.
2: Do not apply optical power to the detector until AFTER the device is power on and the APD bais is confirmed
to be set to the lowest level.
TIA Freq. Response
GHz
1 2 3 4 5 6 7 8 9
0
-2
-4
-6
-8
-10
Relative Response -dB
10
Terahertz Technologies Inc.
169 Clear Rd, Oriskany NY 13424
855-TTI-TEAM (884-8326)
Phone: [phone] Fax: [phone]
email: [email protected]
web: www.teratec.us

TIA-4000 Specifications
Detector Type InGaAs/InP APD
Bandwidth (-3 dB) 30 KHz to 7 GHz typical
Transimpedance Gain 500 Ohms
Spectral Response (950-1650) Gain 2 - 7
Maximum Linear Input Power -10 dBm
Maximum Input power without damage -6 dBm
Sensitivity -25 dBm @ 10-12BER, 231-1 PRBS
Output Impedance Terminate in 50 Ohms
Output Connector Type K SMA female
Fiber Optic Connector FC-APC or FC-PC
Input Numerical Aperture 0.11
Optical Return Loss Typ. 30dB
Wall-mount Supply Power Requirements 120/240 VAC, 50-60Hz
Mains Connectors Supplied North America, British, Continental Europe, Australian
Dimensions 4.0” L, 2.5” W, 1.2” H, (102 , 63 , 31 mm)
Weight 5 oz., 150 g.
LED Annunciators Provided Power On
Operating Temperature Range 0 - 40 C
Standard Warranty Two Years, Workmanship, 30 DaySatisfaction Guarantee
Accessories Supplied Transit Case, Universal Power Supply, Manual
TTI reserves the right to change specifications without notice. Operating Sequence
Turn on sequence:
1. Turn on the TIA-4000
2. Hold ▼button for 7 seconds to decrease APD
voltage
3. Connect optical power
4. Adjust APD voltage to achieve desired gain
Turn off sequence:
1. Remove optical power
2. Decrease APD voltage, hold ▼button for 7
seconds to decrease APD voltage
3. Turn off TIA-4000
Failure to operate the TIA-4000 as directed will void
the warranty
ELECTRÓNICA
BARCELONA
Via Augusta 125, Ático 2ª Camino de Santiago, 20
08006 - BARCELONA
Tel. [phone] Fax. [phone]
CENTRO
19290 - FONTANAR
Tel. [phone]
www.setup-electronica.es / [email protected]
Setup Electrónica, S.L.