SFOS-2 SFOS-6 SFOS-10 SFOS-20 SFOS-50 TFOS-4 TFOS-5

Fiber Optical Solution’s single- and three-axis FOGs consist of the one light source at 1550 nm wavelengths (superluminescent diode – SLD), depolarizer, one or three photodetectors, fiber splitters to divide the light into two or three parts, one or three sets of ring interferometers to sense one or three orthogonal angular rate, and signal processing circuits. In this design a multifunction integrated optical chip (MIOC) is used for splitting the light into clockwise and counterclockwise waves, light polarization and for electro-optic imparting a phase modulation to the lightwaves in the loop. The signal processing design is based on conversion of the photodetector signal to a digital demodulation and integration. The loop is closed by driving the integrated optical phase modulator with a voltage ramp whose slope is proportional to rotation rate.

 

 

Parameter SFOS-2

(1 axis)

SFOS-6

(1-axis)

SFOS-10

 (1-axis)

SFOS-20

(1-axis)

SFOS-50

(1-axis)

TFOS-4

(3-axis)

TFOS-5

(3-axis)

Range of measured angular rate, °/s ±550 ±250 (optional ±1000)  ±550

(optional ±90)

±30 ±12 ±540 ±400
Bias drift at stabilized temperature (100 s-averaging, 1σ), °/hour ≤0.1

~0.001 (Allan variance)

≤0.03
~0.005 (Allan variance)
≤0.005

~0.001

(Allan variance)

≤0.003
~0.0005 (Allan variance)
≤0.0015
~0.0001 (Allan variance)
≤0.1
~0.01 (Allan variance)
≤0.1
~0.007 (Allan variance)
Bias drift at changing temperature from -40°C to +60°C (100 s-averaging, 1σ), °/hour ≤0.7 ≤0.1 ≤0.03 ≤0.05 ≤0.3 ≤0.3
Scale factor error in temperature range -40°C to +60°C (1σ), ppm ≤800 ≤300 ≤100 ≤100 ≤20 ≤200 ≤200
Bandwidth, Hz >1000 (user defined)
Random walk (Allan variance), °/√hour ≤0.015 ≤0.003 ≤0.0007 ≤0.0005 ≤0.0001 ≤0.01 ≤0.007
Physical Characteristics
Power supply, V 5±0.25 5±0.25 5±0.25 5±0.25 5±0.25 5±0.25 27±5
Power consumption, W ≤6 ≤7 ≤7 ≤7 ≤7 ≤7 ≤8
Weight (net), kg 0.2 0.35 0.9 1.7 2.5 0.7 1.2
Dimensions, mm Ø70×28 Ø100×30 Ø150×405 Ø250×45 Ø250×45 80×95×62.5 110×110×92
Operational temperature range -40°C ~ +60°C -40°C ~ +60°C -40°C ~ +60°C -40°C ~ +60°C -40°C ~ +60°C -40°C ~ +60°C -40°C ~ +60°C
Output RS-485 RS-485 RS-485 RS-485 RS-485 RS-422 RS-422

 

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