業界精度的多波長計
作為加拿大 EXFO公司的一家子公司的Berleigh公司，是一家世界著名的波長計生產廠家。從1972年成立至今，一直致力于波長的精確測量。其多波長計WA－7600精度達0.2ppm，是多波長計的計量標準，同業達一個量級。WA－7600、WA－7100廣泛應用于大學、研究所、光纖通信的研發、生產企業以及DWDM的系統測試。
WA－7600、WA-7100可以進行如下項目的測量：
1.波長的測量：光波長及譜寬的精確測量，ITU-T grid 中心波長的測量
2. 功率的測量：峰值功率、積分功率的測量
3. 光信噪比測量
4. DWDM系統及器件的測試，可以同時分析測量多達256個通路的通道特性
5. 波長、功率漂移測量以及實時監控
2. 功率的測量：峰值功率、積分功率的測量
3. 光信噪比測量
4. DWDM系統及器件的測試，可以同時分析測量多達256個通路的通道特性
5. 波長、功率漂移測量以及實時監控
WA－7600、WA－7100具有如下優勢：
1. 業界波長精度，測量置信度（3s）。WA－7600精度為0.2ppm。其經濟型WA－7100的波長精度亦是優于同業的值 兩倍（1ppm）。具有內置的HeNe激光器用于連續的波長校準。波長計精確度優于±0.02pm。基于Michelson 干涉儀原理，長達20多年的制造經驗。自動的色散、溫度和壓力校正。
2. 波長及功率的測試可以上溯至NIST認證標準。EXFO公司采用K.Nakagawa等人提出的使用乙炔氣體的吸收譜作為1.5mm頻帶的測量基準，這一工作已得到NIST認證成為波長測量的標準。
3. 高的光譜分辨率：高達30pm(4GHz)的光譜分辨率，不僅是現在DWDM系統(100GHz/50GHz)理想的測試工具，同時可以用于未來25GHzDWDM系統的測試。
4. 三種測試模式可同時進行：頻譜模式、數據模式、監控模式。
5. 大彩色顯示屏，圖形界面用于顯示光譜曲線，可以方便地對曲線進行詳盡地分析。
6.快速的測試：1秒鐘內完成所有項目的單次測量。
7. 設備接口齊全：除提供標準串、并口及顯示、打印接口外，同時提供GPIB接口以及LabViewLabWindows應用。
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附－英文原版的說明
WA-7600 and WA-7100 Optical Channel Analyzers employ proven scanning Michelson interferometer-based Wavemeter technology to determine the absolute wavelength of an optical signal under test by comparing its interference fringe pattern with that of a built-in HeNe laser wavelength standard. Unlike other wavelength meters, all factors that can affect wavelength measurement are accounted for, ensuring the highest possible accuracy. The absolute wavelength specification has a confidence level of 3 σ, meaning 99.6 % of measurements fall within specification limits. To ensure accuracy, all Wavemeter systems are traceable to recognized standards.
Simultaneous Wavelength and Power Measurement
Combining proven scanning Michelson interferometer-based technology with advanced digital processing results in the ability to measure and differentiate the absolute wavelengths of up to 256 discrete optical signals. The accuracy of these measurements is ± 0.3 pm. What’s more, the WA-7600 can simultaneously measure the individual powers of the optical signals. In addition to the WA-7600, EXFO also offers the WA-7100 Wavemeter Multiline Optical Channel Analyzer. Identical to the WA-7600, it offers an absolute wavelength uncertainty of ± 1.5 pm, providing a lower-cost alternative.
Simultaneous Wavelength and Power Measurement
Combining proven scanning Michelson interferometer-based technology with advanced digital processing results in the ability to measure and differentiate the absolute wavelengths of up to 256 discrete optical signals. The accuracy of these measurements is ± 0.3 pm. What’s more, the WA-7600 can simultaneously measure the individual powers of the optical signals. In addition to the WA-7600, EXFO also offers the WA-7100 Wavemeter Multiline Optical Channel Analyzer. Identical to the WA-7600, it offers an absolute wavelength uncertainty of ± 1.5 pm, providing a lower-cost alternative.
High-Resolution Optical Spectral Analysis
Unlike other multiwavelength meters, the WA-7600 and WA-7100 Wavemeter provide the full optical spectrum on a clear, easy-to-read display, for the most precise DWDM channel analysis. Spectral resolution is as high as 30 pm, resulting in a narrow, sharp-edged spectral response. Discrimination between closely spaced DWDM channels is easily achieved for current 100 GHz and 50 GHz channel spacing and future 25 GHz channel spacing.
Automatic Calculation Increases Productivity
The WA-7600 and WA-7100 automatically process measurement data, providing critical DWDM system performance information. In addition to resolving the individual optical carriers and accurately confirming their wavelengths and powers, the WA-7600 and WA-7100 calculate parameters such as channel spacing and OSNR.
