Yokogawa AQ6375

Optical Spectrum Analyzer, range: 1200-2400nm

Range from 1200 to 2400 nm
Dynamic range 90 dB
Sensitivity -70 dBm
Measurement resolution from 50 pm to 2 nm
Wavelength measurement accuracy ±50÷500 pm

– Free Space input (PC and APC connectors, and SM, MM, PCF, LDF fibers…)

– Best-in-class sensitivity and dynamic range, thanks to a special
monochromator and coatings absorbing stray radiation.

High LONG WAVELENGTH performance

The AQ6375B is a bench top optical spectrum analyzer covering the wavelength range from 1200 to 2400 nm, with additional benefits from gas-purge input/output ports, a built-in cut filter for high-order diffracted light, and an innovative dual-speed mode that doubles the sweep speed compared to the standard sweep mode.

Specification:

– Wavelength range from 1200 to 2400 nm
– Gas-purge ports to reduce water vapor effects
– Built-in cut filter for high-order diffracted light
– High sensitivity down to -70 dBm
– High resolution down to 0.050 nm
– Wide dynamic range (55 dB)
– Fast auto-calibration
– Free Space optical input, ensuring maximum flexibility, low maintenance costs and high reliability
– Excellent performance in environmental gas detection using laser spectroscopy
– An essential tool for research and development and for the production of optical devices in the wavelength range from the telecom band to 2.4 μm

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)

New features:

Purge function

Due to its high resolution and sensitivity, the AQ6375B can actually detect the presence of water molecules in the air. Water vapor is detected in the upper near-infrared wavelength region and can overlap with or mask the spectral characteristics of the actual device under test in this specific region.
By continuously supplying a clean purge gas such as nitrogen to the monochromator through the ports on the rear panel, the AQ6375B can reduce the impact of water vapor absorption and provide more reliable and accurate measurements than ever before.

Built-in cut filter for high-order diffracted light

Due to the diffraction technology used, the monochromator can under certain circumstances generate high-order diffracted light, which appears at wavelengths equal to integer multiples of the input wavelengths.
By cutting off incoming light below 1150 nm using a built-in filter, the AQ6375B drastically reduces the impact of high-order diffracted light on the measurement. Therefore, the measured data is always reliable and reproduces the actual signal under test.

Dual-speed mode

Doubles the sweep speed, with only a 2 dB loss compared to the standard sensitivity value.

High sensitivity: down to -70 dBm

The AQ6375B can measure optical power from +20 dBm to -70 dBm thanks to its highly dynamic and very low-noise components and circuits used for detection. This enables precise measurements of both high- and low-power sources.
The measurement sensitivity can be selected from 7 values according to the measurement speed required for the specific test to be performed.

High resolution and wide dynamic range

The AQ6375B uses a double-pass monochromator structure to achieve high wavelength resolution (0.05 nm) and a wide close-in dynamic range (55 dB). In this way, closely spaced signals and noise can be measured separately.

Higher performance

Fast sweep

Thanks to its sweep technique, the AQ6375B achieves a much higher sweep speed than conventional measurement systems that use a monochromator. The max. sweep time is only 0.5 sec. for a 100 nm span.

Fast command processing and data transfer

Using a fast microprocessor, the AQ6375B achieves very high command processing speed, and the Ethernet interface provides up to 100 times faster data transfer speed than GP-IB.

Fast auto-calibration

The AQ6375B has a built-in reference light source for wavelength calibration and optical alignment of the monochromator components, which allows for always accurate measurements.

The calibration and alignment process takes less than 2 minutes and is fully automatic.

NOTE: Wavelength calibration can also be performed using an external reference source.

Free Space optical input

TROUBLE-FREE, because no internal fiber can be scratched or contaminated
MAINTENANCE-FREE, because there is no need to clean internal fibers
VERSATILE, because the instrument accepts /PC and /APC connectors
DUAL PURPOSE, because the instrument accepts both single-mode and multimode fibers, without the impact of high insertion loss resulting from MM-SM fiber matching

Videos

AQ6375 model description:

Applications of spectrum analyzers:

Free Space input:

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