World-Class Optical Performance

  • Wavelength range: 600 to 1700nm
  • High wavelength accuracy: ±0.01nm
  • High wavelength resolution: 0.02nm
  • Wide dynamic range: 78dB typ.
  • Wide level range: +20 to -90dBm
  • Fast measurement: 0.2 sec. (100nm span)
  • Applicable to single-mode and multimode fibers

Standard and High-Performance Models

There are two models available, Standard and High performance. The High performance model provides even higher wavelength accuracy and dynamic range.

High wavelength resolution: 0.02nm

High Wavelength Accuracy: ±0.01nm

  • High performance model: ±0.01nm (C band)
  • Standard model: ±0.02nm (C+L band)
Wavelength Range Standard (-12) High Performance (-22)
1520 to 1580 nm
1580 to 1620 nm
1450 to 1520 nm
Full range
±0.02 nm
±0.02 nm
±0.04 nm
±0.1 nm
±0.01 nm
±0.02 nm

±0.04 nm
±0.1 nm

Ultra-High Dynamic Range: 78dB typ.

With the reduced stray-light in the monochromator, AQ6370D achieves ultra-high dynamic range of typ. 78dB.

Standard (-12) High Performance (-22)
Peak± 1.0 nm
Peak± 0.4 nm
Peak± 0.2 nm
73 dB
62 dB
45 dB
73 dB (Typ.78dB)
64 dB (Typ.70dB)
50 dB (Typ.55dB)
*Resolution setting 0.05 nm

Example of the dynamic range
Peak ±1.0nm, Resolution setting 0.05 nm,
High dynamic mode: ON, High performance model

Sharper Filter Edge

The high performance model can also achieve a higher dynamic range within 0.2nm of the peak wavelength. With the sharper spectral characteristics of the monochromator, spectral signals in close proximity can be separated clearly and measured accurately.


Standard (-12) High Performance (-22)
Peak± 0.2 nm
Peak± 0.1 nm
55 dB
37 dB
58 dB (Typ.60dB)
45 dB (Typ.50dB)
*Resolution setting 0.02 nm

Example of the spectral shape

Stray-light suppression ratio: 80dB typ.

This new specification provides stray-light suppression capability when High dynamic mode, usually taking longer measurement time, is not used. The AQ6370D contributes to shortening the measurement time with the high stray light suppression ratio.

Standard (AQ6370D-12) High Performance (AQ6370D-22)
73dB 76dB (Typ. 80dB)
*Resolution setting 0.1nm

Example of the stray-light suppression ratio
High dynamic mode: ON, Resolution setting 0.1 nm, High performance model

Wide Level Range: +20DBm to -90dBm

The AQ6370D can measure high power sources such as optical amplifiers and pump lasers for Raman amplifiers, and very weak optical signals as well. Measurement sensitivity can be chosen from seven categories according to test applications and measurement speed requirements.

  • Improved level sensitivity: -85dBm (1000 to 1300nm)
  • Smoothing Function – Reduce noise on the measured spectrum
  • High dynamic mode – Obtain a better dynamic range by reducing the influence of stray-light, which is caused when the input is a strong optical signal.

Free Space Input

  • Multimode and single mode fiber on the same OSA.
  • AQ6370D’s low insertion loss for multimode fiber is also beneficial to maintain the excellent measurement efficiency.
  • Small insertion loss variation at the input
  • connector increases measurement repeatability.
  • No damage connecting fibers
  • because there is no physical contact.
  • APC level correction
  • The APC level correction function corrects the level offset caused by an insertion loss of angled PC connector.

Excellent Efficiency

Fast Sweep: 0.2sec./100nm

With an advanced monochromator, faster electrical circuits, and noise reduction techniques, the AQ6370D achieves fast measurement speed even when measuring a steep spectrum from DFB-LD or DWDM signals, or when measuring a low power signal from a broadband light source.

Fast Remote Interface (Ethernet, GP-IB)

Wide Span Sweep yet High Resolution

The 50,001 data sampling points expands measurement range in a single sweep while keeping a high wavelength resolution. This makes your measurement easier and more efficient than conventional systems.

Easy Operation

Trace Zooming

  • Change display conditions, such as center wavelength and span, by clicking and dragging the mouse.
  • Enlarge your area of interest instantly and move it at will.

Mouse & Keyboard Operation

  • Front panel operation proven intuitive and easy to use by our many of users.
  • Even easier with a mouse.
  • The keyboard helps enter labels and file names.

Easy Data Handling

  • USB Storage
  • USB interfaces support large-capacity removable memory and hard disk drives.
  • 512MB Internal Memory
  • for over 20,000 traces
  • All-at-Once Trace Filing
  • All seven traces can be saved in one file at once.