N7751A, N7752A, N7761A, N7762A, N7764A

Connectivity

FC/APC angled (Option -022) or

FC/PC straight (Option -021) contact connector interface

Fiber type

9/125 µm SMF 28

Wavelength range

1260 nm to 1640 nm

Attenuation range

0 dB to 40 dB (45 dB typ.)

Attenuation setting mode

Power setting mode

Range

0 dB to 40 dB

–50 dBm to +20 dBm

Resolution

0.01 dB

0.01 dB

Repeatability¹

typ. ± 0.05 dB for attenuation 0 dB to 30 dB

typ. ± 0.10 dB for attenuation 30 dB to 40 dB

± 0.025 dB

Accuracy (uncertainty) ^{1 – 3}

typ. ± 0.10 dB for attenuation 0 dB to 10 dB typ. ± 0.15 dB for attenuation 10 dB to 20 dB

typ. ± 0.40 dB for attenuation 20 dB to 40 dB

Relative accuracy (uncertainty) ^{1, 2, 4}

Relative accuracy (uncertainty) 1, 2, 4

± 0.05 dB ± 300 pW

Polarization dependent loss ⁵

typ. ≤ 0.15 dB_PP for attenuation 0 dB to 10 dB typ. ≤ 0.25 dB_PP for attenuation 10 dB to 20 dB

typ. ≤ 0.5 dB_PP for attenuation 20 dB to 40 dB

≤ 0.15 dB_PP ⁶

Settling time

typ. 20 ms ⁷

typ. 100 ms ⁶

Insertion loss ⁸

typ. ≤ 1.2 dB (excluding connectors)

≤ 2.2 dB (including connectors) ⁹

Attenuation transition speed

selectable from 0.1 to 1000 dB/s

Relative uncertainty of monitor power meter ^{2, 10}

± 0.05 dB ± 300 pW

Averaging time of monitor power meter

2 ms to 1 s

Return loss

typ. 45 dB

Maximum safe input power

+23 dBm if applied to input port; < +18 dBm if applied to output port

Optical path blocking

typ. 45 dB

N7766A and N7768A

Connectivity

FC/PC straight contact connector interface

Fiber type

50/125 µm (Option 050) or 62.5/125 µm (Option 062) 80 μm-core (Option 080) MMF

Wavelength range

800 nm to 1370 nm

Attenuation range

0 dB to 35 dB

Attenuation setting mode

Power setting mode

Range

0 dB to 35 dB

–35 dBm to +20 dBm

Resolution

0.03 dB

0.03 dB

Repeatability ^{1, 2, 5}

± 0.025 dB

± 0.025 dB

Accuracy (uncertainty) ^{1 – 5}

± 0.25 dB; typ. ± 0.15 dB

Relative accuracy (uncertainty) ^{1 – 6}

± 0.1 dB

Settling time (for 20 dB step)

typ. 200 ms

typ. 200 ms

Insertion loss ^{1 – 5}

≤ 2.0 dB; typ. ≤ 1.3 dB

Attenuation transition speed

Selectable from 0.1 to 80 and 1000 dB/s

Relative uncertainty of monitor power meter

^{1 – 6}

± 0.1 dB

Averaging time of monitor power meter

2 ms to 1 s

Return loss ^{2, 5, 7}

typ. 25 dB

Maximum safe input power ^{3, 8}

+23 dBm

Optical path blocking

typ. 60 dB

N7751A and N7752A

Sensor element

InGaAs

Wavelength range

1260 nm to 1640 nm

Specification wavelength range

(1310 ± 15) nm, (1490 ± 10) nm, (1550 ± 15) nm

Power range

–80 dBm to +10 dBm

Maximum safe power

+16 dBm

Averaging time

2 ms to 1s

Applicable fiber type

Standard SM and MM ≤ 62.5 µm core size, NA ≤ 0.24

Uncertainty at reference conditions 1, 3

± 2.5%

Total uncertainty ^{2, 5, 6}

± 4.5%

Linearity ⁷

at (23 ± 5)^°C

over operating temperature

± 0.02 dB

± 0.04 dB

Polarization dependent responsivity (PDR) ^{3, 8}

typ. < ± 0.01 dB (1260 nm to 1580 nm)

Spectral ripple (due to interference) ¹⁰

typ. < ± 0.01 dB

Drift (dark) ⁴

± 9 pW

Noise pp (dark) ³, (1s averaging time, 300s observation time)

< 7 pW_pp

Return loss ⁹

typ. > 57 dB