| 摘要 |
In a method of measurement of the birefringence of an optical fiber, the round-trip Jones matrix R(z) for a first interval (0, z) from a measurement starting point 0 in the optical fiber for measurement to a prescribed position z, and the round-trip Jones matrix R(z+”z) for a second interval (0, z+”z) from the measurement starting point 0 to a position z+”z differing from the position z, are acquired, the eigenvalues Á 1 , Á 2 of the matrix R(z+”z)R(z) -1 are determined, and by computing the following equations (1) and (2), Æ = arg Á 1 Á 2 2 ” �¢ n = » �¢ Æ 2 �¢ À ‹ ” �¢ z
(where Æ represents the phase difference between linear polarization components due to birefringence, ”n represents birefringence, and » represents wavelength), the birefringence in the infinitesimal interval ”z from the position z to the position z+”z is obtained. |
