Emcore SITU2831 Externally Modulated RF Amplified Fiber Optic Transmitter and SIRU3000 Fiber Optic Receiver

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1 PRELIMINARY Applications RF and microwave antenna signal distribution EW Systems Broadband delay-line and signal processing systems Frequency distribution systems Radar system calibration Phased array antenna systems, interferometric antenna arrays Features/Benefits Integrated TX RF Amplifiers o Provides 0 db link gain without external RF amplifiers 100 MHz 18 GHz link RF bandwidth o Eliminates the performance and cost penalty of block up/down conversion Low RIN Source Laser, Laser and Modulator Bias Control Circuits and High Optical Input Power Photodiode o Provides high dynamic range of >102 db-hz 2/3 DWDM Option o Increases transport capacity without increasing fiber count Fully Integrated Unit o Reduces integration costs Emcore SITU2831 Externally Modulated RF Amplified Fiber Optic Transmitter and SIRU3000 Fiber Optic Receiver GHz, 1550nm Externally Modulated Self-Contained L K Band Transmitter and Fiber Optic Receiver The Emcore Small Integrated Transmitter Unit (SITU) and Small Integrated Receiver Unit (SIRU) are high performance externally modulated transmitter and receiver modules with an operating bandwidth of GHz. The SITU transmitter unit contains a low noise RF amplifier to provide overall link gain of 0 db for most applications. In addition, the units are DC-coupled, so they will pass RF frequencies below 100 MHz. Two optical output power ranges are available for each transmitter band. The SITU-SIRU series modules are fully integrated units that contain both the optics and the control electronics. Only DC input voltages, fiber optic and the RF signal are required for operation. The units can be used to construct transparent links for antenna remoting. The broad bandwidth is intended for applications such as electronic warfare and Ku band systems. Other applications include delay lines and signal processing systems. The system operates at a nominal wavelength of 1550 nm. Wavelength selected transmitter lasers on the ITU grid are also available to support multi-channel DWDM applications. Performance Highlights Min Typical Max Units Frequency Range GHz RF input power dbm dbm Wavelength 1550 nm Optical Output Power dbm Temperature Range C See following pages for complete specifications and conditions.

2 DATA SHEET OCTOBER 2011 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Symbol Min Max Units Operating Temperature (within specifications) T OP 0 50 C Operating Temperature (with degraded performance) T OP C Storage Temperature T STG C RF Input S in NA -15 dbm SITU2811 Transmitter Reference Block Diagram RF Preamp Microcontroller DC Power and Status Monitor Page 2 of 8

3 SITU2831 Transmitter Optical Specifications Parameter Symbol Condition Min Typ Max Unit Wavelength λ nm Optical Output Power P L dbm Transmitter Source Laser RIN db-hz Connector Return Loss db Optical Connector Type FC/APC Note: In order to prevent reflection-induced distortion degradation, the laser should be connected to an optical cable having a return loss of at least 55 db for discrete reflections and 30 db for distributed reflections. SITU2831 Transmitter RF Specifications Parameter Condition Min Typ Max Unit Operational Bandwidth GHz Units provide signal transport above and below rated RF bandwidth with some degradation in signal gain and return loss RF Input Impedance - 50 Ω RF Return Loss db 2 nd Harmonic Suppression RF input -30 dbm dbc 1 db Compression Point RF Connector Transmitter GHz 10 GHz and +8.5 dbm RX Optical Input 50 ohm 2.9 mm female dbm +9 db SITU2831 Transmitter DC Power Consumption Max Input Voltage Max Current +5 2 A A A A SITU-SERIES Physical Parameters Configuration Self Contained Housing Dimensions 1.3 H x 3.6 W x 9.2 D Operating/Storage Temperature -40 C to +70 C Weight 35 oz. Typical Page 3 of 8

4 SITU2831 D-Connector Pin Out Pin Function Comments VDC 2-15 VDC 3 +5 VDC 4-5 VDC 5 Laser Current Monitor 1 V/A 6 Optical Power Monitor 0.25 V/mW 7 Reserved for factory use 8 Reserved for factory use 9 TX Power Control 0V (grounded): off Floating (internally pulled-up to +5V): on 10 NC 11 NC 12 GND 13 GND 14 GND 15 Reserved for factory use NOTE: The TX Power Control, Pin 9, is used to disable the laser power within the transmitter. For normal operation, this lead should be left disconnected, as the SITU unit has an internal pull-up resistor to provide the 5V or logic high state. To disable the transmitter, this lead should be grounded to provide the 0V or low logic state. Under no condition, should any voltage in excess of +5V be applied to pin 9, as this will damage the internal laser power control. If this pin is not needed, insulate the bare conductor on the end of the supplied power harness to avoid accidental contact with voltages in excess of +5V. Page 4 of 8

5 SIRU3000 Receiver Specifications Electrical Frequency Range 0.05 MHz to 22 GHz Units provide signal transport above and below rated RF bandwidth with some degradation in signal gain and return loss When used with the SITU2831, RF bandwidth is GHz Electrical Power Requirements Photodiode Monitor Output RF Connector RF Output Impedance Receiver Gain Rg ma max 0.1 V/mA typical 2.9 mm female 50 Ω -9 db typical Optical Wavelength Connectors Optical Input Power Responsivity (@ 1310 nm) Responsivity (@ 1550 nm) nm FC/APC dbm (15 mw) Maximum > 0.7 A/W minimum > 0.7 A/W minimum Physical Configuration Dimensions Self Contained Housing See Mechanical Drawing Below Operating/Storage Temperature -40 C to +70 C Weight 10 oz. Typ SIRU-Series D-Connector Pin Out V 2 n/c 3 n/c 4 GND 5 n/c 6 Photodiode Monitor 7 n/c 8 n/c 9 n/c Page 5 of 8

6 Broadband Link Performance SITU2831 quadrature bias with 0 dbm RF input and SIRU3000 receiver with +8.5 dbm optical input (unless otherwise indicated) Parameter Symbol Condition Min Typ Max Unit RF Bandwidth GHz Link Gain* 10 GHz 18 GHz 1 db Noise Figure 10GHz 18 GHz 20 db Input IP3 10 GHz 18 GHz -4 dbm Spurious Free Dynamic Range 10 GHz 18 GHz 100 db Hz 2/3 Gain Variation 100 MHz to 1 GHz 5 1 GHz to 18 GHz 5 10 db *Receiver RF output will change 2 db for each 1 db of RX optical input power level change Typical S21 Frequency Response SITU2831 Transmitter with 0 dbm RF input and SIRU3000 Receiver with +8.5 dbm optical input +4.8 db 1 18 GHz Page 6 of 8

7 Ordering Information Transmitter Modules SITU GHz Externally Modulated Fiber Optic Transmitter Module, +10 dbm Optical Output w/ Integrated +33 db RF Ampifier Receiver Modules SIRU GHz Fiber Optic Receiver Module SITU Series Transmitter and Receiver Package Outline (dimensions in inches) Page 7 of 8

8 SIRU-Series Receiver Modules Package Outline (dimensions in inches) Laser Safety Class IIIb Laser Product FDA/CDRH Class IIIb laser product. All transmitter versions are Class IIIB laser products per CDRH, 21 CFR 2040 Laser Safety requirements. All versions are Class 3B laser products per IEC* :1993. Maximum Power = 12 dbm Caution: Use of controls, adjustments and procedures other than those specified herein may result in hazardous laser radiation exposure. *IEC is a registered trademark of the International Electrotechnical Commission. Page 8 of 8