Advantest Q8347 Optical Spectrum Analyzer

Evaluating Optical Narrow Bandpass Filters for Wavelength Division Multiplexing

- High resolution: 0.01 nm (at 1.55 µm) 0.001 nm (at 0.5 µm)

1 GHz (in optical frequency mode)

- High wavelength accuracy: ±0.01 nm

- Measurement speed: 1 to 3.5 seconds

- Coherence analysis range: ±165 mm

ADVANTEST's own interferometer type

Wavelength resolution of 0.01 nm, wavelength accuracy of ±0.01 nm in the 1550 nm band (resolution of 1 GHz, accuracy of ±1 GHz in optical frequency mode)

The Q8347 spectrum analyzer enhances the performance of spectrum analyzers using Fourier Spectrum Systems and Michelson interferometers.

The Q8347 has a wavelength resolution of 0.01 nm in the 1550 nm spectral band and a wavelength accuracy of ±0.01 nm (1 GHz resolution and ±1 GHz accuracy in optical frequency mode).

In addition, the Q8347 accurately measures each wavelength of an optical wavelength-division-multiplexing (WDM) transmission signal by separating the spectra.

It is particularly useful for evaluating the characteristics of optical narrow bandpass filters used for WDM, such as AWGs and fiber gratings.

In addition, the Q8347 can be used to analyze chirped signals for LD and Soliton transmission.

500 nm band resolution of 0.001 nm Higher resolution can be achieved at shorter wavelengths.

With a resolution of 0.001 nm in the 500 nm band, the Q8347 is best suited for analyzing blue LDs.

Trend Monitoring Function

Input power and wavelength can be displayed as a digital readout, as well as a time-domain trend graph.

Printer and floppy disk drive are standard The system is equipped with a high-speed thermal printer capable of reproducing the display in less than 8 seconds.

In addition, the system is equipped with a floppy disk drive using MS-DOS for easy data storage and analysis.

In addition, data is stored in text format for easy analysis and processing on a personal computer. In addition, the stored data can be subsequently scaled.

Displayable optical frequency

In addition to the normal wavelength display mode, the measurement spectrum can also display the optical frequency.

Since light in terahertz units can be read directly, this is useful for measuring optical wavelength division multiplexing and chirping from LDs, as well as for analyzing Soliton transmission systems.

Coherence analysis of ±165 mm

Because the Q8347 uses a Michelson interferometer, the system is capable of performing coherence analysis.

This feature makes it easy to evaluate the noise rejection performance of a disc LD. In addition, the travel of the interferometer can be greatly increased to allow analysis over a range of ±165 mm.

As a result, more detailed analysis can be performed in addition to the conventional secondary maximum peak (α value).

Curve fitting function

The Q8347 offers sech2 and Gaussian function curve fitting. Therefore, it can be used for spectral analysis of soliton transmission systems.

List display

The peaks of spectrum or coherence data can be displayed as digital data containing up to 200 points.

The separation and level of each channel of an optical WDM transmission system can be seen at a glance.