| 摘要 |
<p>A method capable of measuring polarization mode dispersion (PMD) with simple techniques and high sensitivity. A polarization mode dispersion measuring device comprising an FSF laser (FSFL)(3) for generating a frequency chirp light, an optical amplifier (AMP) (5) for amplifying the frequency chirp light, an offset circuit (7), a μ/2 plate (8), a beam splitter (BS) (9), an analyzer (2) for retrieving polarization components required for measuring from each light wave after propagating through fast axis and delay axis of an optical fiber to be measured (1), a lens (10), a photodetector (PD) (11) for detecting a light wave passed through the lens (10), and an RF spectrum analyzer (RFSA) (12) for observing a spectrum waveform of the light wave. Since a frequency chirp light, after propagating through the optical fiber to be measured (1) and passing through the analyzer (2), is detected and a variation in best frequency is measured to determine a PMD value, a PMD value can be determined simply and with high sensitivity.</p> |
