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Coupling characteristics of the spun optical fiber with multiple stress elements
摘要： Possible coupling between fundamental modes and higher order modes in a spun optical ?ber with multiple stress elements is analyzed. It shows that only the higher order HEmn mode with the opposite circular polarization state can be coupled with the fundamental HE11 mode. The coupling between the fundamental HE11 mode and the TE, TM or EH modes can never be occurred. In the possible coupling between HEmn mode and HE11 mode, m should be equal to N-1, where N is the number of the stress elements. As a comparison, the coupling property in a spun optical ?ber with single stress element is also demonstrated. In this case, the fundamental HE11 mode can not only be coupled with the higher orderHE2n mode but also can be coupled with the higher order TE mode.
关键词： Coupling characteristics,Polarization,Stress elements,Spun optical fiber,Optical fiber
更新于2025-09-23 15:19:57
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Stress distribution characteristics of the optical fiber with multiple stress elements
摘要： The stress field in an optical fiber with one circular stress element is calculated theoretically. The stress field distribution for any optical fiber with multiple stress elements is derived based on the superposition theorem and the integration method. As is shown in this paper, the stress field in the core or in the region near core can be expressed by a formula with sine or cosine function. This result is important to reveal the coupling characteristics of the stress induced optical fiber with multiple stress elements when it is spun by an appropriate spinning rate.
关键词： Optical fiber,Multiple stress elements,Integration method,Stress field,Superposition theorem
更新于2025-09-11 14:15:04