2016年2月16日, YOKOGAWA Meters & Instruments 正式发布AQ6376光谱分析仪。AQ6376是一款动态范围大、分辨率高的台式光谱分析仪,能精准测量激光光谱,波长范围在1.5~3.4μm之间,AQ6376为业内首款支持3-μm波段的基于分光原理*1的光谱分析仪。
光谱分析仪是一种光学测量设备,可以分析各种光学器件诸如半导体激光器和光纤激光器的波长成分,以便评估它们的特性。3-μm激光器目前在环境测量和医药领域已经引起广泛关注,AQ6376将有助于提高3-μm波段光器件的测量效率并加速3-μm激光器在上述领域的应用。
开发背景
近年来,激光吸收光谱*2 开始广泛应用于检测环境领域的各种气体,例如碳氧化物(COx),氮氧化物(NOx)和烃类气体(CXHY)。虽然此类应用的光源主要采用2-μm半导体激光器,但由于这些气体在较长的波长中对光有更强的吸收,因此业界对3-μm激光器的需求也与日俱增。另一方面,光激光器也逐渐引入医疗领域,其中对于分析含水物质的需求也造成3-μm光纤激光器需求激增。因此,对于能精确测量3-μm波段光谱的分析仪器的需求也随之增长。目前已经有一些可以测量3-μm波段光的光谱的设备,包括干涉仪型测量仪器和使用分光计的大型测量系统。然而它们都有动态范围窄和波长分辨率低等缺点,从而降低了测量精度。因此,市场急需可以突破上述局限的高性能光谱分析仪。
自从1980年进入光谱分析仪市场,Yokogawa一直致力于发展和完善在可见光和近红外范围内光谱的测量技术。凭借在光谱分析领域的专长,Yokogawa现已开发出AQ6376光谱分析仪,实现3-μm中红外波段的测量。
产品特点:
1. 业界领先的测量范围
AQ6376拥有80dB功率测量动态范围和55dB邻近动态范围*3,与当前基于干涉仪型的3-μm波段的测试仪器相比,分别要高出10,000倍和300倍。目前市场上的任何其他仪器都不能达到此动态范围*4 AQ6376足以实现对半导体激光器进行边模的准确测量。2. 行业最高的波长分辨率
AQ6376拥有业界最高的100pm波长分辨率,是当前用于3-μm波段的干涉仪型仪器的三倍*53. 实现光谱精确测量
AQ6376还具备额外两项增强功能。一是可以清除分光镜内的水气,以免水吸收影响到某个特定波长光的测量。同时,所有的分光镜由于其设计原理都有波长为入射光2~3倍的高阶衍射光的问题,AQ6376的另一个增强功能可在测量过程中降低高阶衍射光的影响。主要目标用户
高校,科研院所、有源和无源光器件制造商。主要应用
- 使用半导体,光纤以及其它宽谱激光器的发射光谱的测量。
- 光滤波器波长传输特性的测量,例如光纤布拉格光栅(FBG)*6*1 使一束宽谱光通过狭缝进入衍射光栅,以提取窄范围波长光的技术。
*2 使用激光照射分子,分子会根据其类型吸收特定波长的光。这个原理用于分析光谱和定量评估气体成分。
*3 该指标用于衡量光谱仪从较强信号(波长)端分离出弱信号的能力。
*4 基于YOKOGAWA的调查,截至2016年2月。动态范围是一个参考值(典型值),而不是保证值。
*5 基于YOKOGAWA调查,截至2016年2月。100pm是3-μm波段光测量时可以达到的最高波长分辨率。
*6 利用折射率的周期性变化反映光纤特定波长的一种设备。
Key feature summary
Long wavelength range: 1500 to 3400 nm
Gas purging ports to reduce water vapor effects
Built-In cut filter for high order diffracted light
Double Speed Mode to further enhance fast measurement speed
High sensitivity down to -65 dBm
High resolution to 0.10 nm
Wide close-in dynamic range (55dB)
Fast auto-calibration
Free space optical input for maximum flexibility, low maintenance, and high reliability
Applicable to single-mode and multimode fibers
Excellent performance for environmental gas sensing Laser Spectroscopy
Indispensable tool for R&D and manufacturing of optical devices in the wavelength range from telecom band to 3.4μm
New Features
Purge feature
Due to the high resolution and sensitivity of the AQ6376, it can actually detect the presence of water molecules in the air. The water vapor is detected in the upper Near-IR wavelength region and could overlap with or mask the spectral characteristics of the actual device under test in that particular region.
By continuously supplying a pure purge gas such as nitrogen to the monochromator through the ports on the back panel, the AQ6376 can reduce the influence of water vapor absorptions and provide more reliable and accurate measurements than ever before.
Built-in cut filter for high order diffracted light
Due to the diffractive technology used, the monochromator in some circumstances could generate high order diffracted light, which appears at wavelengths equal to the integral multiple of input wavelengths.
By cutting incoming light below 1500 nm with the built-in filter, the AQ6376 drastically reduces the influence of high order diffracted light on the measurement. Thus, the measured data are always reliable and replicate the real signal under test.
Double speed mode
Increases the sweep speed up to 2 times compared to the standard sweep mode, with only a 2 dB penalty to the standard sensitivity value.
Long Wavelength Range: from 1500nm to 3400nm
The AQ6376 covers not only the wavelength span used in communications, but also the 3µm region which is used for environmental sensing, medical, biology and industrial applications.
High Sensitivity: down to -65dBm
The AQ6376 can measure optical power from +13dBm down to -65dBm thanks to its high-dynamic and very low noise components and circuits used for photo detection. This enables precise measurements of both high power and low power sources.
Measurement sensitivity can be chosen among 7 values according to the measurement speed required by the specific test to be performed.
The spectrum of a white light source (yellow) and the background noise of AQ6376 (purple)
High Resolution & Wide Dynamic Range
The AQ6376 uses a double-pass monochromator structure to achieve high wavelength resolution (0.10 nm) and wide close-in dynamic range (55 dB). Thus, closely allocated signals and noise can be separately measured.
Measured 1550 nm laser, Close-in Dynamic range: @ peak±2 nm
High speed Measurement
GREATER EFFICIENCY
High Speed Sweep
With a proprietary sweep technique the AQ6376 achieves a much faster sweep speed than conventional measurement systems, which use a monochromator. Max. sweep time is only 0.5 sec. for 100 nm span.
Fast command processing and data transfer
Applying a fast microprocessor, the AQ6376 achieves very fast command processing speed and Ethernet interface provides up to 100 times faster data transfer speed than GP-IB.
Fast auto-calibration
The AQ6376 has a built-in reference light source for wavelength calibration and optical alignment of the monochromator components, allowing it to deliver always-accurate measurements.
The calibration and alignment process takes less on the unit take than 2 minutes and is fully automatic.NOTE: The wavelength calibration can also be performed by using an external reference source.
Free-Space Optical Input
The AQ6376 uses a free-space optical input structure, i.e. no fiber is mounted inside the instrument.
This smart solution is:
WORRY-FREE, as no internal fiber can be scratched or get dirty
MAINTENANCE-FREE, as no internal fiber has to be cleaned
VERSATILE, as the instrument accepts both /PC and /APC connectors
DUAL PURPOSE, as the instrument accepts both Single-Mode and Multi-Mode fibers without being affected by the high insertion loss from MM-SM fibers matching
商品属性 [波长范围] 1500-3400 nm [光学分辨率] 0.1nm [Aperture Ratio] 1500-3400 nm [CCD Resolution] 0.1nm