Optical pulse tester
专利汇可以提供Optical pulse tester专利检索，专利查询，专利分析的服务。并且PURPOSE: To enhance resolution and to broaden a dynamic range by inserting an optical amplifier between an optical branching means and a photodetector or an optical fiber to be measured and controlling the gain with exciting light in relation to an optical pulse or an excitation current.
CONSTITUTION: Light from a light source 2 driven by a pulse generator 1 passes from A to B in the optical branching means 3 to be made incident on the optical fiber to be measured 5 and the reflected light from the optical fiber 5 passes from the B to C in the means 3 to be made incident on the optical amplifier 6. By considering the pulse generating time of the generator 1 and a time when neighboring Fresnel reflected light reaches a semiconductor optical amplifier 6a, a control means 11 controls a driving circuit 6C and the amplifier 6a is controlled with the excitation current. The output from the amplifier 6a is allowed to pass a band pass type optical filter 6b, so that naturally emitted light is removed and only the vicinity of the wavelength of the reflected light is inputted in the photodetector 7 to be converted into an electrical signal. The signal is amplified by an amplifier 8 and the processed result by an averaging circuit 9 is displayed on a display part 10. Thus, the easiness and the accuracy of measurement are improved and a measuring range is enlarged.
COPYRIGHT: (C)1991,JPO&Japio，下面是Optical pulse tester专利的具体信息内容。
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