Skip to main content

Optical Spectrum Analyzer: MMF Measurement Solution

Multi Mode Fiber Support

When using a fiber probe to evaluate the optical characteristics of VCSEL, DFB-LD, Silicon Photonics, etc., the key points in improving yield are shorter evaluation time and higher measurement stability.
With high basic performance and MMF input options starting from the 850-nm band, Anritsu’s Optical Spectrum Analyzer MS9740A takes development and manufacturing efficiency to the next level.

For VCSEL and DFB-LD evaluations, for Silicon Photonics evaluations and for optical filter evaluations

Point1 High Sensitivity: High coupling efficiency for excellent measurement stability

Standardized wavelength accuracy when using MMF [unique to Anritsu]

Accurate measurement of DUT test specifications for active optical devices, etc., is supported by standardized specifications at the Optical Spectrum Analyzer MS9740A side.
Input to the optical spectrum analyzer without loss of optical carrier power using an evaluation system with MMF increases measurement stability, leading to shorter inspection times. Mis-matched core diameters and numerical aperture (NA) when connecting MMF to SMF cause optical loss.
The Multi mode Fiber Input MS9740A-009 option supports connection of fiber core diameters up to 62.5 μm, minimizing loss and assuring stable optical sensitivity and fast sweeping conditions suitable for level and SMSR measurement.

General-Purpose Optical Spectrum Analyzer     MS9740A + MMF Input Option

Point-2 High Resolution: Accurate spectrum analysis confirms true DUT values

High-resolution measurements in 850-nm band

Although RMS measurement is recommended for spectrum width analysis of multi mode light sources, such as VCSEL, each mode must be identified with sufficient resolution.
With high-resolution measurement in the 850-nm band, the MS9740A supports higher-accuracy spectrum analysis for verifying true DUT measurement values.

850-nm VCSEL Spectrum Measurement Example

Point3 Fast Sweep Speed: Helps cut test costs in combination with high resolution

0.2 s/5 nm Span

Due to its high resolution and fast sweep speed, the MS9740A can monitor spectrum and noise level changes in real-time; the status of light source wavelength changes can also be confirmed. Data transfer times are cut and measurement processing times (sweeping, analysis, data transfer) are slashed to less than 20% of previous instruments, playing a key role in reduced test costs.

MS9740A Faster Measurement Times

Point-4 Reduced Reflection Attenuation: Stable spectrum measurement with fiber-coupled optical receiver section

Reduced optical reflection at optical reception

Measurement results are practically unaffected by reflected light even without using angle-polished fiber connectors (APC).

Point-5 Built-in Remote Commands: Shorter creation of substitute remote commands

Partial support for other OS remote commands

Remote commands are mostly backwards compatible with earlier Anritsu instruments (MS9710B, MS9710C, MS9780A), and some remote commands are compatible with spectrum analyzers from other makers, helping reduce time for creating remote-command programs.

For More Optical Spectrum Analyzer MS9740A Details