| 摘要 |
PROBLEM TO BE SOLVED: To obtain a wavelength variable laser diode array capable of obtaining a uniform optical output independently of wavelength. ! SOLUTION: Each length of a plurality of curved transparent waveguides 7, 8, 9, 10 is shorter as a wavelength of a corresponding laser diode is longer. The curved transparent waveguides 7, 8, 9, 10 and a transparent waveguide of an optical multiplexer 5 constitute a plurality of transparent waveguides connecting from a plurality of laser diodes 1, 2, 3, 4 to an optical amplifier 6, respectively. A relational expression of ΔL1=Lave*(C1-Cave)/Cave is satisfied, where Lave represents an average value of the lengths of the transparent waveguides, Cave represents an average value of absorption coefficients of the transparent waveguides with respect to wavelengths of the laser diodes 1, 2, 3, 4, C1 represents an absorption coefficient of the transparent waveguides with respect to a wavelength of one laser diode among the laser diodes 1, 2, 3, 4, and ΔL1 represents |
