OP931 Bidirectional Insertion Loss and Return Loss Meter

OptoTest_OP931
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The OP931 Bidirectional Insertion Loss & Return Loss Meter measures insertion loss (IL) and return loss (RL) for fiber optic components bi-directionally. Return loss is measured using the pulse based method, without a need for mandrel wrapping or index matching gel at the far end of the cable. Insertion loss is measured with a continuous and stabilized source of the test set in combination with one of the built-in precision optical power meters. To measure IL/RL in A-B and B-A directions, the internal 2×2 optical switch executes a fast, bi-directional measurement of IL and RL.

Product Features

  • Fully automated, concurrent dual wavelength IL and RL measurements with no mandrel wrapping
  • Bidirectional operation; measuring total insertion loss and individual return loss
  • External power meter for uni-directional operation
  • On-board, InGaAs optical power meters feature measurement range extending beyond -65dBm
  • Available in multimode and single mode
  • Quad-wavelength (FTTX) single mode model also available upon request
  • Controlled launch condition (underfill, fulfill, overfill) available for multimode fiber
  • Wide dynamic range on return loss measurements:
    10dB to 80dB for single mode
    10dB to 58dB for multimode
  • Can be controlled remotely via USB using OPL series software or OptoTest DLLs
  • Integrated temperature monitoring
  • Convenient benchtop size (19-inch rackmount frame available upon request)
By combining it with two OP720 optical switches, the OP931 can be used to perform bi-directional tests on multifiber cables. This setup reduces testing time and the amount of connections that need to be made in the test process.
By combining it with two OP720 optical switches, the OP931 can be used to perform bidirectional tests on multifiber cables.
This setup reduces testing time and the amount of connections that need to be made in the test process.

Product Specs

Return Loss Single Mode FTTX Multimode
Source Wavelength 1310nm, 1550nm 1310nm, 1550nm, 1490nm, 1625nm 850nm, 1300nm
Calibrated
Measurement Range
-10dB to -80dB -10dB to -80dB -10dB to -58dB
Measurement Linearity ±1dB (-12dB to -72dB) ±1dB (-12dB to -72dB) ±1dB (-10dB to -45dB)
Distance Range up to 2500 meters
Mandrel-free minimum distance 1.7 meters (both reflections <-45dB)
Insertion Loss Single Mode FTTX Multimode
Source Center Wavelength ±30nm from nominal ±30nm from nominal ±30nm from nominal
Source Bandwidth <10nm <10nm <140nm (850nm) <200nm (1300nm)
Internal Fiber 9/125μm (SMF28) 9/125μm (SMF28) 50/125μm, 62.5/125μm, 105/125μm
Launch Condition N/A N/A Available upon request
Output Power* (typical) -1.5dBm -2.5dBm -18dBm(850nm) -20dBm(1300nm):
62.5/125μm
Insertion Loss Stability** ±0.02dB ±0.02dB ±0.02dB
Measurement Linearity (Relative Accuracy)***
Deviation ± 0.05dB 0dBm to -65dBm at 1490nm
Deviation ± 0.01dB <10dB power variation

*For single channel systems. **Over 1 hour with a max. change of 1ºC. ***For 1, 2, and 3mm detectors.

Optical Power Meter 1mm InGaAs 3mm InGaAS 5mm InGaAs 10mm InGaAs 3mm Silicon
Measurement Range +6dBm to -72dBm
at 1490nm
+3dBm to -72dBm
at 1490nm
0dBm to -65dBm
at 1490nm
0dBm to -55dBm
at 1490nm
0dBm to -65dBm
at 980nm
Wavelength Range 850nm to 1650nm 400nm to 1100nm
Selectable Wavelength Standard wavelengths (850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm) Standard wavelengths
(650nm, 850nm, 980nm)
Measurement Resolution (Display) 0.001dB
Absolute Accuracy ±0.25 dB at calibration conditions for all NIST traceable wavelengths
Measurement Linearity (Relative Accuracy)
Deviation ± 0.05dB +3dBm to -65m
at 1490nm
0dBm to -65dBm
at 1490nm
0dBm to -55dBm
at 1490nm
0dBm to -45dBm
at 1490nm
0dBm to -55dBm
at 980nm
Deviation ± 0.01dB <10dB power
variation
<10dB power
variation
<10dB power
variation
<10dB power
variation
<10dB power
variation
Source 1310nm/1550nm LASER 1310nm/1490nm/1550nm/1625nm LASER 850nm/1300nm LED
Source Center Wavelength ±30nm from nominal ±30nm from nominal ±30nm from nominal
Source Bandwidth <10nm <10nm <140nm (850nm)
<200nm (1300nm)
Internal Fiber 9/125μm (SMF28) 9/125μm (SMF28) 50/125μm, 62.5/125μm, 105/125μm
Launch Condition N/A N/A Available upon request
Output Power (typical) -1.5dBm -2.5dBm -18dBm(850nm) -20dBm(1300nm):
62.5/125μm
Source Stability* ±0.02dB ±0.02dB ±0.02dB

* Over 1 hour with a max. change of 1ºC.

Measurement Timing Single Mode FTTX Multimode
IL and RL, Dual Wavelength 3s* 6s 3s*
Switching Time (Multichannel) 100ms

* Using the front panel in Dual ILRL mode or running OPL-Pro with real-time update enabled.

Specifications are subject to change, please confirm specific performance characteristics of the product at the time of ordering. All specifications are valid within temperature range of 18ºC to 24ºC unless otherwise noted. For additional specifications please contact OptoTest.

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