The existence of higher order mode waves in expansion mufflers is proved theoretically.
从理论上推导了扩张室消声器内可能存在的高次波。
Since the characteristics of higher order cladding mode resonances are specific in LPG, it will exhibit different phenomena during the process of grating manufacturing.
由于长周期光栅在较高次包层模谐振时的特殊性，在光栅制作的过程中会出现与其它包层模谐振不同的特性。
Such higher order cladding mode resonances will result in ultra-broadband LPG. The possible application of such an LPG is predicted.
这种较高次包层模谐振将导致极宽带的长周期光栅，论文中还预计了这种长周期光栅未来的应用。
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