| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical module which achieves a longer service lifetime by protecting an optical element while appropriating humidity in an open package that is not hermetically sealed. SOLUTION: The optical module is provided with the optical element and a heat-generating body that heats the optical element. The optical element is heated by allowing the heat-generating body to generate heat in a period in which the optical element is not energized. The optical module may be further provided with a first switch part for turning OFF/ON the energization to the heat-generating body with a phase reverse to a phase of the ON/OFF of the energization to the optical element. Another optical module is provided with an optical element and a heat-generating body that heats the optical element. In another optical module, a calorific value of the total sum of a calorific value due to the optical element itself and a calorific value of the heat-generating body is set to exceed a prescribed value with the energization to the optical element in a period in which the optical element is energized. COPYRIGHT: (C)2008,JPO&INPIT
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