Optical attenuator and optical power meter calibration systems with optical-pulse conversion and averaging | |
IMAMURA, TAKAYUKI; OHUCHI, YUJI | |
1992-09-15 | |
著作权人 | ANRITSU CORPORATION, A CORP. OF JAPAN |
专利号 | US5148233 |
国家 | 美国 |
文献子类 | 授权发明 |
其他题名 | Optical attenuator and optical power meter calibration systems with optical-pulse conversion and averaging |
英文摘要 | The invention is designed to calibrate a low-level optical power by a substitution method using a pulse generating section in which a light-shielding disk having a sectorial opening, as a component capable of accurate optical attenuation, is rotated in a light beam to generate an intermittent pulse signal having a duty ratio corresponding to the size of the opening, and the pulse signal is averaged to obtain an optical attenuation equal to the duty ratio. More specifically, while an object to be calibrated is set in a given standard state, a first pulse train having a duty ratio d1=Tw.sub.1 /Tf.sub.1 is input to the object, and an average optical power value A of an output from the object is measured and stored. Subsequently, a second pulse train having a duty ratio d2=Tw.sub.2 /Tf.sub.2 is input to the object, and the object is adjusted such that an average optical power value of an output from the object becomes the value A. Proper calibration can be performed by assigning the optical attenuation of the adjusted object to d1/d2. |
公开日期 | 1992-09-15 |
申请日期 | 1990-10-25 |
状态 | 失效 |
内容类型 | 专利 |
源URL | [http://ir.opt.ac.cn/handle/181661/34421] ![]() |
专题 | 半导体激光器专利数据库 |
作者单位 | ANRITSU CORPORATION, A CORP. OF JAPAN |
推荐引用方式 GB/T 7714 | IMAMURA, TAKAYUKI,OHUCHI, YUJI. Optical attenuator and optical power meter calibration systems with optical-pulse conversion and averaging. US5148233. 1992-09-15. |
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