VIAVI OSA-500R High-Performance Full-Band Optical Spectrum Analyzer Module with In-Band OSNR

Full-band 1250 to 1650 nm optical spectrum analyzer module with 0.038 nm resolution bandwidth and in-band OSNR measurement for ROADM networks.

Wavelength range: 1250 to 1650 nm
Resolution bandwidth (FWHM): 0.038 nm
Absolute wavelength accuracy: ± 0.01 nm
Wavelength reference: internal, physical constant

Datasheet

Overview

The VIAVI OSA-500 Series covers optical spectrum analyzers for spectral measurements in CWDM systems in the access network and DWDM systems in high-speed backbone networks with data rates up to 800G. The OSA-500R module is intended for ROADM-based systems and measures the true in-band OSNR using the VIAVI in-band OSNR method.

The OSA-500R covers the full band from 1250 to 1650 nm and has a 0.038 nm optical resolution bandwidth, which makes it suitable for ultra-dense DWDM networks with channel spacing down to 25 GHz. Its optical design uses free-space optics in a field-modular format.

An internal wavelength calibrator provides 0.010 nm wavelength accuracy without external recalibration. In-band OSNR measurement time is shortened by a fast polarization controller.

Platforms and software

The module works as a full-band optical spectrum analyzer for the ONT and OneAdvisor 1000 platforms. It includes automated testing with pass/fail analysis, built-in component test applications for laser diodes, LEDs and optical amplifiers, and a software option for PMD testing based on the fixed analyzer method.

Key Features

Full-band 1250–1650 nm wavelength range for CWDM and DWDM networks
0.038 nm optical resolution bandwidth
0.01 nm wavelength accuracy
Internal online wavelength calibration with no recalibration required
In-band capability to measure true OSNR in ROADM-based networks
Optical Polarization Splitting method (OPS-method, VIAVI pat pending) for in-band OSNR
Fast polarization controller for shorter in-band OSNR measurement time
Signal analysis for 100/200/400/800 G data rates
100G polarization multiplexing channels OSNR online measurement without channel overlap
Automated testing with pass/fail analysis at the push of a button
Software option for PMD testing based on the fixed analyzer PMD test method
Built-in optical component test applications for laser diodes, LEDs, and optical amplifiers
High filter selectivity over the full band in a field-modular design

Specifications

Spectral Measurement

Wavelength range	1250 to 1650 nm Unless otherwise specified, specifications based on 23°C ±2°C with an FC/PC connector after warm-up
Resolution bandwidth (FWHM)	0.038 nm Typical for 1520 to 1565 nm at 18 to 28°C
Absolute wavelength accuracy	± 0.01 nm Typical for 1520 to 1565 nm at 18 to 28°C
Wavelength reference	internal, physical constant
Wavelength recalibration period	internal recalibration (no factory recalibration required)
Readout resolution	0.001 nm
Measurement samples	120,000

Power Measurement

Dynamic range	−70 to +23 dBm Max. power per channel +15 dBm
Absolute accuracy	±0.5 dB Typical for 1520 to 1565 nm at 18 to 28°C; at −10 dBm, including PDL
Total safe power	+20 dBm
Readout resolution	0.01 dB
Linearity	±0.1 dB Signal power from -40 dBm to +10 dBm
Flatness	±0.25 dB Typical for 1520 to 1565 nm at 18 to 28°C

WDM Measurement

Optical rejection ratio at ±0.2 nm (for 50 GHz ch-spacing)	40 dBc Typical for 1520 to 1565 nm at 18 to 28°C
Optical rejection ratio at ±0.4 nm (for 100 GHz ch-spacing)	47 dBc Typical for 1520 to 1565 nm at 18 to 28°C
Channel spacing	25 to >200 GHz, CWDM
Number of optical channels	256
Data signals	up to 1 TBps
Modulation formats (such as NRZ/RZOOK, DB, PSBT, CSRZ, DPSK, BPSK, QPSK, and PM QPSK)	All formats supported
Scanning time, full band (including WDM analysis)	<5 s
Scanning time, C-band (including WDM analysis)	1 s

Measurement Modes

Analysis	WDM, Drift, DFB, LED, FPL, EDFA in-band OSNR, ST
Display	Graph, WDM table, graph and table

In-band OSNR

I-OSNR dynamic range	up to >30 dB
PMD tolerance	up to 25 ps For data rates up to 10 Gbps
Measurement accuracy	±0.5 dB Typ ±0.5 dB for OSNR <25 dB, signal power >–25 dBm, PMD <25 ps; typ. ±1 dB for data rates ≥40 Gbps with ch-spacing ≥100 GHz
Data signals	up to 400 Gbps Except for dual pol-mux and fast polarization scrambled signals

Optical Interfaces

Optical port	universal SM-PC, universal SM-APC
Connectors	FC, SC, ST, LC, DIN
ORL	>35 dB At 1550 nm

Dimensions

Weight (module)	2.2 kg (4.6 lb)
Size (module)	50 x 250 x 305 mm (20 x 98 x 120 in) Inch figures as printed in the datasheet

Environmental

Operating temperature	+0 to +45°C (32 to 113°F)
Storage temperature	−20 to +60°C (−4 to 140°F)
Relative humidity	0 to 95% noncondensing

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

Applications

True in-band OSNR measurement in agile optical networks including ROADM testing and dispersion compensating modules
Provisioning and troubleshooting ROADM networks
Verification of ROADM configurations in agile optical networks
Deploying and maintaining DWDM metro and core networks
DWDM and CWDM system testing during installation, maintenance, and network upgrade
Testing 100/200/400/800 G interfaces and networks
Installing and maintaining CWDM systems in CATV, access, and mobile backhaul
Automated DWDM passive and active component testing
System verification testing against customer preset limits
Full-band optical spectrum analysis on ONT and OneAdvisor 1000 platforms

Options & Accessories

Option	Description
2281/91.55	OSA-500R, PC-version — ROADM, In-Band OSNR OSA-500R module with PC connector interface
2281/91.65	OSA-500R, APC-version — ROADM, In-Band OSNR OSA-500R module with APC connector interface
ONA1000-OSA500R-P1	OneAdvisor 1000 with OSA-500R package
EOFS200	Optical fiber cable software — Application software for report generation