User`s guide

Optical Head Specifications Specifications
Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
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Optical Head Specifications
All optical heads have to be operated with the single (Agilent 81618A) or dual
(Agilent 81619A) Interface Modules.
Table 2 Optical Head Specifications
Agilent 81623B
Agilent 81623B
Calibration option C85 / C86
Agilent 81623B
Calibration option C01 / C02
Sensor element Ge, ∅ 5 mm
Wavelength range 750 nm to 1800 nm
Power range –
80 dBm to +10 dBm
Applicable fiber type
Open beam
Standard SM and MM max 100 µm core size, NA ≤ 0.3
Parallel beam max ∅ 4 mm
Uncertainty at refer-
ence conditions [1]
± 2.2 % (1000 nm to 1650 nm)
± 3.0 % (800 nm to 1000 nm)
± 2.2 % (1000 nm to 1650 nm)
± 2.5 % (800 nm to 1000 nm)
± 1.7 % (1000 nm to 1650 nm)
± 3.0 % (800 nm to 1000 nm)
Total uncertainty [2],
[9]
± 3.5% ± 100 pW
(1000 nm to 1650 nm)
± 4.0% ± 250 pW
(800 nm to 1000 nm)
± 3.5% ± 100 pW
(1000 nm to 1650 nm)
± 3.5% ± 250 pW
(800 nm to 1000 nm)
± 3.0% ± 100 pW
(1000 nm to 1650 nm)
± 4.0% ± 250 pW
(800 nm to 1000 nm)
Relative uncertainty:
- due to polarization [3]
- spectral ripple
(due to interference)
[4]
< ± 0.01 dB
[10]
(typ. < ± 0.005 dB)
< ± 0.006 dB (typ. < ± 0.003 dB)
Linearity (power): [5]
at 23°C ±5°C
at operating temp.
range
(CW –60 dBm to +10 dBm)
[9]
< ± 0.025 dB
< ± 0.05 dB
Return loss [7] > 50 dB, typ. > 55 dB
[8]
> 56 dB
Noise (peak to peak)
[6]
< 100 pW (1200 nm to 1630 nm)
< 400 pW (800 nm to 1200 nm)