Advantest Optical Spectrum Analyzers
6 models with full specifications in Fiber Optics Comm.
Advantest optical spectrum analyzers (OSAs) provide high-precision spectral measurement of optical components and fiber optic communication systems. This guide assists test engineers and technical buyers in selecting the appropriate instrument for characterizing lasers, optical fibers, and wavelength division multiplexing (WDM) systems. The Advantest range is divided into two primary measurement technologies: traditional diffraction-grating monochromator systems and Fourier-transform systems based on Michelson interferometers. Choosing between these systems depends on the target wavelength band, the required resolution, and whether direct coherence length measurements are necessary.
- Wavelength Range
- 350 nm to 1750 nm
- Measurement Methods
- Monochromator & Michelson Interferometer
- Highest Resolution
- Up to 0.001 nm at 1550 nm
- Coherence Capabilities
- Direct coherence length measurement
All models
| Model | Type | Display | Interfaces | Wavelength Range |
|---|---|---|---|---|
| Q8384 | Spectrum Analyzers | 10.4-inch color LCD | GPIB | 600 nm to 1700 nm |
| Q8344A | Spectrum Analyzers | Built-in CRT display | GPIB (IEEE-488) | 350 nm to 1000 nm |
| Q8381A | Spectrum Analyzers | 9-inch CRT display | GPIB (IEEE-488) | 350 to 1750 nm |
| Q8383 | Spectrum Analyzers | 6.5-inch color LCD | GPIB | 350 nm to 1750 nm |
| Q8341 | Spectrum Analyzers | 6.5-inch color TFT LCD | GPIB, VGA output, Centronics Parallel, Keyboard, 3.5-inch FDD | 350 to 1000 nm |
| Q8347 | Spectrum Analyzers | Color LCD | GPIB (IEEE-488) | 350 to 1750 nm |
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Monochromator-Based Spectrum Analyzers
Monochromator-based OSAs are designed for broad spectral analysis and general component testing across single-mode and multimode fibers. The Advantest Q8381A and Advantest Q8383 both cover a broad wavelength range of 350 nm to 1750 nm. The Q8381A features a 9-inch CRT display, a wavelength accuracy of +/- 1 nm, and a weight of 25 kg. In comparison, the Q8383 is lighter at 15 kg, features a 6.5-inch color LCD, and provides ±0.5 nm wavelength accuracy.
For high-end applications focusing on the 1.55 µm band, the Advantest Q8384 covers 600 nm to 1700 nm. It provides a minimum wavelength resolution of 10 pm and wavelength accuracy of ±20 pm in the 1.55 µm band. It supports specialized evaluation functions, including EDFA noise figure measurements and limit-line Pass/Fail testing.
Interferometer and Fourier-Transform Systems
Instruments using a Michelson interferometer perform Fourier spectrum analysis, which allows them to measure parameters that grating-based monochromators cannot, such as direct optical coherence length.
For the short-to-mid wavelength range (350 nm to 1000 nm), the Advantest Q8344A and Advantest Q8341 utilize this interferometer approach. The Q8344A features a built-in CRT and direct coherence length measurements. The Q8341 includes a 6.5-inch color TFT LCD, an internal He-Ne laser reference (632.8 nm), and measures coherence length up to 40 mm.
For wider wavelength coverage, the Advantest Q8347 operates across 350 nm to 1750 nm. This model is optimized for evaluating narrow-band optical filters and WDM networks, offering a wavelength resolution of up to 0.001 nm at 1550 nm.
Popular models
Frequently asked questions
- Which Advantest models support direct coherence length measurements?
- The Advantest Q8344A and Advantest Q8341 use a Michelson interferometer system to perform Fourier spectrum analysis, enabling direct optical coherence length measurements. The Q8341 can measure coherence lengths up to 40 mm.
- What is the key advantage of the Advantest Q8347 over the Q8341?
- While both use Fourier spectrum systems based on Michelson interferometers, the Advantest Q8347 operates across a wider wavelength range of 350 nm to 1750 nm and provides up to 0.001 nm resolution at 1550 nm. The Advantest Q8341 is limited to a wavelength range of 350 nm to 1000 nm.
- Which model is best suited for testing erbium-doped fiber amplifiers (EDFAs)?
- The Advantest Q8384 is specifically configured for EDFA and optical amplifier analysis, supporting the measurement of noise figure (NF) indices in the 1.55 µm band with a 10 pm minimum wavelength resolution.