Yokogawa AQ6377

The AQ6377 is the latest version of the optical spectrum analyzer series, offering extended wavelength coverage in the MWIR region from 1900 to 5500 nm. The long wavelength range makes the AQ6377 ideal for environmental sensing and medical applications.

Wide wavelength range: 1900-5500 nm
Measurement resolution: 0.2-5 nm
Wavelength accuracy: ±0.5 nm
Dynamic range: −60 to +13 dBm
Easy maintenance (calibration, reference source)

Yokogawa aq6377

Key features of the AQ6377 include gas purging input/output ports, a built-in cut-off filter for higher-order stray light, and an innovative dual-speed mode that increases the sweep speed by up to 2 times compared to the standard mode.

– Wide wavelength range from 1900 to 5500 nm
– 5 available measurement resolution settings from 0.2 to 5 nm
– Wavelength accuracy: ±0.5 nm
Easy maintenance thanks to the built-in calibration function and wavelength reference source.
– Measurement dynamic range: −60 to +13 dBm
Suitable for measuring high- and low-power sources used in various application areas. Sensitivity: HIGH1-3 is high-dynamic-range mode only.

Technical specification

Band		Telecom		VIS	VIS & Telecom	exNIR	MWIR	MWIR
Model		AQ6370D-12	AQ6370D-22	AQ6373B	AQ6374	AQ6375B	AQ6376	AQ6377

Wavelength range		600-1700nm		350-1200nm	350-1750nm	1200 nm-2400nm	1500nm-3400nm	1900 nm-5500nm
Application		General applications, telecom		Bio-Photonics	General applications, telecom, bio-photonics	Environmental monitoring, gas detection	Environmental monitoring, gas detection	Environmental monitoring, gas detection
Applicable fibers		SM, GI50, GI62.5 large-core fibers up to 200µm		SM, GI50, GI62.5 large-core fibers up to 800µm	SM, GI50, GI62.5 large-core fibers up to 800µm	SM, GI50, GI62.5	SM, GI50, GI62.5	SM, large-core fibers up to 400µm
Wavelength resolution setting (nm)	Min	0.02		0.01	0.05	0.05	0.1	0.2
	Max	2		10	10	2	2	5
Wavelength accuracy (nm)		±0.1 (Full range) ±0.04 (1450 to 1520 nm)		±0.2 (Full range) +/-0.05 nm (633 nm)	±0.2 (Full range) ±0.05 (633 nm) ±0.05 (1523 nm)	±0.5 (Full range) ±0.05(1520 to 1580nm) ±0.1(1580 to 1620nm)	±0.5 (Full range)	±0.5 (Full range)
		+/-0.02 nm(1580 to 1620nm)	+/-0.01 nm (1580 to 1620 nm)
		Maximum sensitivity		-90dBm (1300 to 1620nm)		-80dBm(500 to 1000nm)	-80dBm(900 to 1600nm)	-70dBm(1800 to 2200nm)	-65dBm(1500 to 2200nm)	-60dBm(2900 to 4500nm)

Purge function

Due to its high resolution and sensitivity, the AQ6377 can actually detect the presence of water molecules in the air. Water vapor is detected in the upper region of the near-infrared wavelength range and may overlap or mask the spectral characteristics of the actual device under test in that specific region.

By continuously supplying clean purge nitrogen to the monochromator through ports on the rear panel, the AQ6377 can reduce the effect of water vapor absorption and deliver more reliable and accurate measurements than ever before.

Innovative technologies

Built-in cut-off filter for higher-order stray light

Due to the diffraction technology used, the monochromator can under certain circumstances generate higher-order diffracted light, which appears at wavelengths equal to integer multiples of the input wavelengths.
By cutting off incoming light below 1500 nm using the built-in filter, the AQ6377 drastically reduces the effect of higher-order diffracted light on the measurement. Therefore, the measured data is always reliable and reproduces the actual signal under test.

Dual-speed mode

Increases the sweep speed by up to 2 times compared to the standard mode, with a loss of only 2 dB relative to the base sensitivity value.

Free Space optical input

The AQ6377 uses a free-space optical input structure (i.e. no optical fiber is mounted inside the instrument), which is most effective for guaranteeing high coupling efficiency, measurement repeatability and maintenance-free operation.