標準號:BS EN 60793-1-45-2003
中文標準名稱:光纖.測量方法和試驗規(guī)程.模場直徑
英文標準名稱:Optical fibres - Part 1-45:Measurement methods and test procedures - Mode field diameter
標準類型:M33
發(fā)布日期:2004/4/26 12:00:00
實施日期:2004/4/26 12:00:00
中國標準分類號:M33
國際標準分類號:33.180.10
適用范圍:This part of IEC 60793 establishes uniform requirements for measuring the mode field diameter (MFD) of optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes.
The MFD represents a measure of the transverse extent of the electromagnetic field intensity of the mode in a fibre cross section, and it is defined from the far-field intensity distribution as a ratio of integrals known as the Petermann II definition. See equation (1).
The definitions of MFD are strictly related to the measurement configurations. The mathematical equivalence of these definitions results from transform relationships between measurement results obtained by different implementations summarized in figure 1 as follows:
Four methods are described for measuring MFD:
- method A: direct far-field scan;
- method B: variable aperture in the far field;
- method C: near-field scan;
- method D: bi-directional backscatter using an optical time domain reflectometer (OTDR).
All four methods apply to all categories of type B single-mode fibre shown in IEC 60793-2 and operating near 1 310 nm or 1 550 nm. Method D is not recommended for the measurement of fibres of unknown type or design.
Information common to all four methods is contained in clauses 1 to 8, and information pertaining to each individual method appears in annexes A, B, C and D, respectively.
相關標準
《YY/T0691-2008》傳染性病原體防護裝備 醫(yī)用面罩抗合成血穿透性試驗方法(固定體積、水平噴射)
《GB/T29865-2013》紡織品 色牢度試驗 耐摩擦色牢度 小面積法
《GB/T29778-2013》紡織品 色牢度試驗 潛在酚黃變的評估
《GB/T24218.1-2009》紡織品 非織造布試驗方法 第1部分:單位面積質量的測定
《GB/T3916-2013》紡織品 卷裝紗 單根紗線斷裂強力和斷裂伸長率的測定(CRE法)
《FZ/T01057.6-2007》紡織纖維鑒別試驗方法 第6部分:熔點法
《GB/T10685-2007》羊毛纖維直徑試驗方法 投影顯微鏡法
《GB/T9995-1997》紡織材料含水率和回潮率的測定烘箱干燥法
《GB/T22800-2009》星級旅游飯店用紡織品
《GB/T3921-2008》紡織品色牢度試驗耐皂洗色牢度
百檢網專注于為第三方檢測機構以及中小微企業(yè)搭建互聯(lián)網+檢測電商服務平臺,是一個創(chuàng)新模式的檢驗檢測服務網站。百檢網致力于為企業(yè)提供便捷、高效的檢測服務,簡化檢測流程,提升檢測服務效率,利用互聯(lián)網+檢測電商,為客戶提供多樣化選擇,從根本上降低檢測成本提升時間效率,打破行業(yè)壁壘,打造出行業(yè)創(chuàng)新的檢測平臺。
百檢能給您帶來哪些改變?
1、檢測行業(yè)全覆蓋,滿足不同的檢測;
2、實驗室全覆蓋,就近分配本地化檢測;
3、工程師一對一服務,讓檢測更精準;
4、免費初檢,初檢不收取檢測費用;
5、自助下單 快遞免費上門取樣;
6、周期短,費用低,服務周到;
7、擁有CMA、CNAS、CAL等權威資質;
8、檢測報告權威有效、中國通用;