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redcrag木蟲 (著名寫手)
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[交流]
【求助】請教耦合諧振子問題 已有1人參與
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看到一本光纖光學(xué)里有解釋模式間耦合的內(nèi)容,借用了耦合諧振子間的相位關(guān)系。 請指點(diǎn)哪本本書里有下述耦合諧振子間相位關(guān)系比較詳細(xì)的公式和探討? As is well known from coupled oscillators, energy always flows from that with advanced phase to that with retarded phase. The energy transfer is most efficient if the phase of the driving oscillator is 90? advanced with respect to the driven oscillator. This can be generalized to traveling waves. Right after the launch point, energy from wave A feeds wave B which at this point just emerges. The phase of wave B is automatically arranged such that an energy transfer takes place. A certain distance down the fiber, both waves have experienced a relative phase shift of 90? and energy transfer ceases. A little further on, the phase of wave B is advanced and energy is transferred back! |


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