HP 71450B, 71451B, and 71452B
Optical Spectrum Analyzers
Technical Specifications
HP 70950B OPTICAL SPECTRUM ANALYZER
Spectral Measurements
from 600 to 1700 nm
OPTICAL
INPUT
The HP 71450B, 71451B, and 71452B are diffraction-grating-based optical spectrum analyzers that provide
spectral measurements of optical power versus wavelength and advanced functions for measuring and
characterizing optical components, amplifiers, LEDs, DFB lasers, and Fabry-Perot lasers.
This technical specifications sheet describes the measurement accuracy and operating conditions of the
HP family of optical spectrum analyzer systems. The HP 71450B includes an HP 70950B module, the
HP 71451B includes an HP 70951B module and the HP 71452B includes an HP 70952B module.
The specifications apply to all functions autocoupled over the temperature range 0 to 55° C and relative humidity
<95% (unless otherwise noted). All specifications apply after the instrument’s temperature has been stabilized after
1 hour continuous operation and the auto-align routine has been run. Unless otherwise noted, specifications apply
without USER CAL.
Characteristics and Specifications
The distinction between specifications, characteristics (shown in italicized text), typical performance, and nominal
values is described as follows:
• Specifications describe warranted performance.
• Characteristics provide useful, but nonwarranted information about the functions and performance of the instrument.
• Typical Performance, where listed, is not warranted, but indicates performance which most units will exhibit.
• Nominal Value is an expected, but not warranted, value of the parameter.
2
Specifications for the HP Family
of Optical Spectrum Analyzers
HP 71450B HP 71451B HP 71452B
Wavelength
Range 600 to 1700 nm
Span range (continuously variable) 0.2 nm-full range and zero span
Absolute accuracy
Absolute accuracy
Absolute accuracy
40 nm of Cal signal)
Multimode fiber (62.5 µm) coupling uncertainty
Span linearity
Span linearity
Reproducibility (1 minute) ±0.005 nm
Reproducibility
Tuning repeatability ±0.005 nm
Settability ±0.005 nm
Readout resolution
1
1
(after user cal) ±0.3 nm ±0.3 nm ±0.2 nm
1,2
(after user calibration within ±0.05 nm
2
1, 2
1,2
(1530 nm to 1570 nm) ±0.02 nm
1,2
(1 minute) ±0.001 nm
2
±1 nm
≤
0.3 nm
±0.05 nm, for spans <40 nm
span/trace length
not applicable
Resolution Bandwidth
1
FWHM <0.08 and 0.1 to 10 nm in a 1,2,5 sequence
FWHM of <0.08 nm setting
Resolution accuracy
2
≥
0.5 , 1250 to 1600 nm ±20%
0.1 to 10 nm, 600 to 1700 nm
2
±30%
0.065 nm ±15%
Corrected bandwidth accuracy for noise markers:
≥
0.5 nm, 1250 to 1600 nm ±3%
2
0.2 nm
, 1250 to 1600 nm
±5% (characteristic)
0.2 nm, 1250 to 1600 nm Option 122 specifies ±5%
Amplitude
Calibration accuracy
Scale fidelity
Display resolution log 0.01 dB
Display scale 0.01 to 20 dB/div log in 0.01 dB steps, and linear
Flatness
Polarization dependence
Sensitivity
600 to 750 nm (second order only) –60 dBm
750 to 900 nm (second order) –75 dBm
750 to 900 nm (first order) –65 dBm
900 to 1200 nm –75 dBm
1200 to 1600 nm –90 dBm
1600 to 1700 nm
1, 6
at –30 dBm, 1300 nm ±0.5 dB
5
autorange off (sample detector) ±0.1 dB ±0.05 dB
autorange on (sample detector) ±0.2 dB ±0.07 dB
linear 0.23% of measurement +0.01% of reference level
2,8
2,8
1
1
1
±0.25 dB ±0.25 dB ±0.25 dB
±0.25 dB ±0.25 dB ±0.2 dB
±1 dB ±1 dB ±1 dB
±1.5 dB ±1.5 dB ±1.5 dB
±2 dB ±2 dB ±2 dB
1290 to 1330 nm
1530 to 1570 nm
1250 to 1600 nm
750 to 1600 nm
600 to 1700 nm
1, 6
1250 to 1600 nm ±0.5 dB
1300 to 1320 nm ±0.5 dB ±0.125 dB
1542 to 1562 nm ±0.5 dB ±0.05 dB
750 to 1600 nm
600 to 1700 nm
4
3
2
2
±.1.5 dB
±2.5 dB
–80 dBm
Specifications for the HP Family
of Optical Spectrum Analyzers
(continued)
3
HP 71450B HP 71451B HP 71452B
Dynamic Range
1
Excluding multiple order grating responses
In 0.1 nm resolution 600 to 1700 nm –50 dB
In 0.1 nm resolution 1250 to 1600 nm –55 dB
Chop mode on
2
–70 dB at ± 0.5 nm, ±1 nm, ±5 nm
–60 dB
≥
±1 nm
≥
±0.5 nm
≥
±1 nm
HP 71452B Option 122
Excluding multiple order grating responses
1250 to 1600 nm
In 0.2 nm resolution –58 dB
In 0.2 nm resolution –65 dB
In 0.1 nm resolution
In 0.1 nm resolution
2
2
–60 dB ≥±0.4 nm
–65 dB ≥±0.8 nm
Input Power
0.05 dB compression level, within selected resolution
Maximum displayed level
2
Maximum safe input level +20 dBm per 5 nm, +30 dBm total
≥
10 dBm
≥
15 dBm
Input Return Loss
With PC or HMS-10/HP connector 9µm >35 dB
>50 dB (internal reflections)
Maximum limited by input fiber size
2
50
µ
m
62.5 µm
2
>28 dB
>26 dB
not applicable
not applicable
≥
±0.5 nm
≥
±1 nm
Sweep Time
2,9
Maximum sweep rate 40 nm/50 ms
Maximum sweep rate in zero span 50
µ
s/trace point
Sweep cycle time
50 nm span, auto zero off <180 ms
50 nm span, auto zoom <340 ms
500 nm span, auto zero on <650 ms
–80 dBm sensitivity, 30 nm span, auto zero on <2 s
–90 dBm sensitivity, 30 nm span, auto zero on <35 s
full span, auto zoom <1 s
Pulse Mode
±0.2 dB
2
2
Turn On >2 µs pulse width ±0.2 dB
Turn Off >10 µs pulse width and 27 dB extinction
Signal-to-Noise
7
CW ±0.63 ±0.18
Pulse Mode ±0.68 ±0.29
±0.2 dB
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