6GHz RF over Fiber

F-RFoF-6GHZ-TxRx
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Description Features Drawings Models Accessories Specification Q&A Support

Description

Analog RFoF optical Transmitter is used to convert RF signals to optical signals that can be sent and carried over long distances of fiber optic cable.

The Optical Receiver converts them back to an RF signal. The two units are connected through 1 single mode fiber up to 40Km.

RF over Fiber modules (RFoF) are commonly used in L-band, S-band satellite, radio telescopes, RF antennas distribution, broadcasting audio, and video, timing synchronization and GPS applications and other telecommunications.

It's very easy and cost effective to extend a signal from any antenna, Modulator or RF instrument, point to point or multipoint to multipoint using fiber optic splitters.

Features

  • Ultra Compact size
  • Flat frequency response
  • Low power consumption
  • Excellent EMI/EMC design
  • Automatic optical power control
  • High dynamic input and output range
  • Wide operating frequency from 100MHz to 6GHz

Applications

  • WiMAX / 4G / 5G
  • Mobile backhaul
  • GPS signal transport
  • All-Digital QAM, DVB-S2, K-band, S-band, L-band  network
  • Data and video distribution
  • Distributed antenna system

IMPORTANT NOTE*** (it is very important to interface our unit with SC/APC - Angle Polished Connector to avoid any light reflections.

If your fiber is terminated with the  SC, ST, FC /PC flat connector, you need to use an optical jumper from PC type to SC/APC for proper conversion. 

Drawings

Model Selection

F-RFoF-6GHZ-TX  RFoF -RF over fiber 6Ghz optical Transmitter

F-RFoF-6GHZ-RX  RFoF -RF over fiber 6Ghz optical Receiver

Accessories & Upgrades

Specification

IMPORTANT NOTE*** (It is very important to interface our unit with FC/APC - Angle Polished Connector to avoid any light reflections.

If your fiber is terminated with the  SC, ST, FC /PC flat connector, you need to use an optical jumper from PC type to FC/APC for proper conversion. 

Transmitter

Absolute Maximum Ratings

Parameter

Symbol

Condition

Min.

Max.

Unit

Operating Case Temperature

Topr

 

-20

+70

°C

Storage Temperature

Tstg

 

-40

+85

°C

DC Operating Voltage

Vd

+5V Pin

+4.7

+5.5

V

RF Input Power

Prf

Without LNA

--

20

dBm

With LNA

--

15

Output Optical Power

Ps

CW

--

12

mW

Relative Humidity

Hr

 

--

95

%

Pressure

Pr

 

86

106

kPa

ESD

 

Human body model

 

Class 1A

 

Note: Operation beyond these absolute maximum conditions may degrade device performance, lead to device failure, shorter lifetime, and will invalidate the device warranty.

 

Typical Specification

Parameter

Test Condition

MIN.

TYP.

MAX.

Unit

Frequency Range

TSC

0.01 ~ 3

GHz

TCC

0.01 ~ 6

Optical Wavelength

CWDM

optional

nm

 

 

 

 

Gain (2)

 

 

 

TSC

Tx with LNA Rx with LNA

6

14

--

 

 

 

 

dB

Tx with LNA

Rx without LNA

-11

-3

--

Tx without LNA Rx with LNA

-11

-3

--

Tx without LNA Rx without LNA

-28

-24

--

 

TCC

Tx without LNA

Rx with LNA

-11

-3

--

Tx without LNA Rx without LNA

-30

-26

--

 

Ripple of Passband

TSC

100M~3GHz,1270nm~1370nm

--

±1.5

±2.2

 

dB

100M~3GHz,1530nm and 1550nm

--

±2.5

±3.0

TCC

100M~6GHz,1270nm~1370nm

--

±1.5

±2.2

100M~6GHz,1530nm and 1550nm

--

±2.5

±3.0

Output Optical Power

+25°C

--

9

--

dBm

RF Return loss (50 Ω)

TSC

10MHz ~ 3GHz, RF Input

--

-10

-5

dB

TCC

10MHz ~ 6GHz, RF Input

--

-10

-5

Input P-1dB?2?

TSC

with LNA, 1.5GHz

--

0

--

dBm

without LNA, 1.5GHz

--

17

--

TCC

without LNA, 3GHz

 

17

 

SFDR(2)

TSC

1.5GHz

102

115

--

dB·Hz2/3

TCC

3GHz

102

113

--

Input IP3(2)

TSC

with LNA, 1.5GHz

4

9

--

dBm

without LNA, 1.5GHz

25

33

--

TCC

without LNA, 3GHz

21

33

--

 

 

 

 

Noise Figure (2)

 

 

 

TSC

with LNA, 1.5GHz 1270nm ~1370nm

--

18

25

 

 

 

 

dB

with LNA, 1.5GHz 1530nm and 1550nm

--

20

26

without LNA, 1.5GHz 1270nm~1370nm

--

32

40

without LNA, 1.5GHz

1530nm and 1550nm

--

35

42

 

TCC

without LNA, 3GHz 1270nm ~1370nm

--

32

42

without LNA, 3GHz 1530nm and 1550nm

--

38

45

Operating Current

with LNA, TSC

--

145

200

mA

without LNA, TSC/TCC

--

55

100

Operating Voltage

+5V pin

+4.8

+5

+5.2

VDC

Bias-T Voltage

Though the RF SMA connector

+4.8

+5

+5.2

VDC

Bias-T Current Supply

Though the RF SMA connector

-

--

200

mA

Note: (1) The lower start frequency such as 9kHz can be customized (without LNA only); (2) Test with optical receiver (see the picture below) and the fiber is 1-meter SMF-28 fiber.

Connector

Type

Connector

RF

SMA (50Ω), Female

Optical

FC/APC (1)

Optical Fiber Type

SMF-28(Standard)

Power

EMI Low Pass Filter, Feed Through Capacitor

Note (1): Other type optical connector available upon request.

PIN Function

PIN

Name

Direction

Note

1

+5V

I

+5V DC Power

2

GND

I

RF and DC Ground

3

OP

O

Optical Power Monitor, Power Level is +2.2V±0.4V Indicate Transmit Optical Power Normal, Otherwise Indicate Transmit Optical Power Abnormal.

     

Ordering Information

Optical Transmitter

OM

-

TxC

xxx

N

x

-

O

S

x

x

OM: Optical Module

 

Frequency Range(1): TSC: 10M~3GHz

TCC:10M~6GHz

Wavelength (2) :127:1270nm

129:1290nm

137:1370nm

153:1530nm

155:1550nm

 

Optical Connector and Fiber Type (3): F

FC/APC SM

L: LC/APC SM

 

 

Operating Temperature(4) 

S: -20 to 70°C

Bias-T: 1:without T:with

LNA(5):

0: without

1: with

Note: The lower start frequency such as 9kHz is available upon request (without LNA only) ;(2) Other wavelengths is available upon request; (3) Other types of optical fiber connector type is available upon request; (4) Other temperature range is available upon request, (5) LNA only supports TSC frequency band for the time being.

 

Receiver

Absolute Maximum Ratings

Parameter

Symbol

Condition

Min.

Max.

Unit

Operating Case Temperature

Topr

 

-20

+70

°C

Storage Temperature

Tstg

 

-40

+85

°C

DC Operating Voltage

Vd

+5V Pin

+4.7

+5.5

V

Saturation Input Optical Power

Ps

CW

--

10

mW

Relative Humidity

Hr

 

--

95

%

Pressure

Pr

 

86

106

kPa

ESD

 

Human body model

 

Class 1A

 

Note?Operation beyond these absolute maximum conditions may degrade device performance, lead to device failure, shorter lifetime, and will invalidate the device warranty.

Typical Specification

Parameter

Test Condition

MIN.

TYP.

MAX.

Unit

Frequency Range

RSC

0.01 ~ 3

GHz

RCC

0.01 ~ 6

RXC

0.01 ~ 12

Optical Wavelength

 

800~1650

nm

 

 

 

Gain (1)

 

RSC

Tx without amplifier Rx with amplifier

-11

-3

--

 

 

 

dB

Tx without amplifier Rx without amplifier

-28

-24

--

 

RCC

Tx without amplifier Rx with amplifier

-11

-3

--

Tx without amplifier

Rx without amplifier

-30

-26

--

RXC

Tx without amplifier Rx without amplifier

-30

-26

--

 

Ripple of Passband (1)(2)

RSC

100MHz ~ 3GHz

--

±1.2

±2

 

dB

RCC

100MHz ~ 6GHz

--

±1.5

±2.2

RXC

100MHz ~ 12GHz

--

±2.0

±2.5

Input Optical Power

+25?

--

--

10

dBm

Back Reflection

 

--

35

--

dB

PD Responsivity

1310nm

0.7

0.8

--

mA/mW

1550nm

0.7

0.85

--

RF Return loss (50 Ω)

RSC

100MHz ~ 3GHz

--

-12

-8

dB

RCC

100MHz ~ 6GHz

--

-10

-7

RXC

100MHz ~ 12GHz

--

-10

-5

Operating Current

with amplifier, RSC/RCC

--

90

120

mA

without amplifier, RSC/RCC/RXC

--

7

10

Operating Voltage

+5V pin

+4.8

+5

+5.2

VDC

Note: (1) RSC and RCC are test with Mini optical Tx (see the below picture), RXC is test with  optical Tx and the fiber is 1-meter SMF-28 fiber. (2) The ripple contains Tx and Rx.

 

Connector

 

Type

Connector

RF

SMA (50Ω), Female

Optical

FC/APC (1)

Optical Fiber Type

SMF-28(Standard)

Power

EMI Low Pass Filter, Feed Through Capacitor

Note (1): Other type optical connector available upon request.
PIN Function  
________________________
________________________
 

PIN

Name

Direction

Note

1

+5V

I

+5V DC Power

2

GND

I

GND

3

OP

O

Received Optical Power Monitor, The Voltage of OP See Below Explanation

The OP voltage (Vop, unit: V) VS     received optical power ( Pop, unit: mW) follow the formula:

Vop≈ D*Pop

The D factor defined as detection factor in V/mW unit. The typical range of D is from 0.25 V/mW to 0.5 V/mW. For example, D=0.375 V/mW, the OP voltage (Vop) VS received optical power (Pop) as shown in the table below:

Vop (V)

Pop (mW)

3.75

10

3.375

9

3

8

2.625

7

2.25

6

1.875

5

0

0

The user can input the known optical power Pop and detect the Vop voltage, and then calculate the approximate value of the D factor of an optical receiver by the formula Vop≈ D*Pop. In this case, the obtained D factor and Vop can be used to estimate the optical power received by the optical receiver in practical applications.

 

Question and Answers

Answer:
What RF frequencies do you need to pass it via fiber ?
This unit supports RF up to 6Ghz, it is most likely too expensive for personal use.
You can use CATV RF over fiber TX/RX
our L-band TX/TX over fiber TX/RX
Please let me know if that would work for you.
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