| 摘要 |
PROBLEM TO BE SOLVED: To stably keep a full width of connection loss fluctuation with an optical circuit part to be connected at 0.1 dB or less, even when a temperature fluctuates from a low temperature (-40 deg.C) to a high temperature (85 deg.C). SOLUTION: In the optical fiber array 10 where a qualtz-based optical fiber 4 is bondedly fixed to a molded glass optical fiber fixing member (for example, an array member 1), a linear expansion coefficient difference between the optical fiber fixing member and an optical fiber 4 is 20×10-7 (1/ deg.C) or more within the range of -40 deg.C to 85 deg.C, at least the optical fiber 4 and the molded glass optical fiber fixing member (for example, the array member 1) have 1×109 N/m2 or more of dynamic modulus of elasticity in the whole range of -40 deg.C to 85 deg.C, the bonding is carried out using an organic adhesive 6 having 101/2 or less of ratio of the maximum value to the minimum value (the maximum value/the minimum value) of the dynamic modulus of elaticity in the range of -40 deg.C to 85 deg.C.
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