英语翻译A tuning range of 11.6 nm corresponding to twelve cavity modes has been demonstrated ,and a SMSR higher than 28dB is obtained throughout the range.There are some difference among SMSRs.The SMSR at 1557nm wavelength is largest .And the SMS
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英语翻译A tuning range of 11.6 nm corresponding to twelve cavity modes has been demonstrated ,and a SMSR higher than 28dB is obtained throughout the range.There are some difference among SMSRs.The SMSR at 1557nm wavelength is largest .And the SMS
英语翻译
A tuning range of 11.6 nm corresponding to twelve cavity modes has been demonstrated ,and a SMSR higher than 28dB is obtained throughout the range.There are some difference among SMSRs.The SMSR at 1557nm wavelength is largest .And the SMSRs > 1557nm wavelength are large ,contrary to those < 1557nm.The reason is the mode coupling competition.The mode coupling competition is changed because of the FBG feedback making some modes advantage and suppressing other laser modes.When the mode selected by the FBG is strong ,the SMSR is large because of a strong mode coupling competition.As Fig.2 shows ,mode intensities over the wavelength range 1550 nm 1557nm are nearly same .The chosen mode has not very large advantage comparing with it s side modes ,leading to lower SMSRs < 1557nm wavelengths.So we get the result s as shown in Fig.7.
英语翻译A tuning range of 11.6 nm corresponding to twelve cavity modes has been demonstrated ,and a SMSR higher than 28dB is obtained throughout the range.There are some difference among SMSRs.The SMSR at 1557nm wavelength is largest .And the SMS
人们已经核实,12个谐振腔模式在11.6纳米的协调范围内是一致的,同时在这个范围中能得到高于28分贝的边模抑制比.边模抑制比(SMSR)之间是存在着不同的.当波长是1557纳米的时候是最大,而SMSR在波长大于1557nm的时候相对于波长小于1557nm的时候来说是较大的.产生这种不同是由于光纤光栅(FBG)的反馈搞成的.这些反馈造成一些模式具有优势并且超过其他的激光模式.一些模式在经过FBG的过滤之后显得强势,这些模式的SMSR显得较大则是因为存在着激烈的波形耦合竞争.如图2所示,在波长范围是1550nm-1557nm之间的模式密度是几乎相同的.相比起周边的模式,被过滤得到的模式并没有很大的优势,这就使得在波长小于1557nm的时候,SMSR显得较小.所以我们得到了如图7所示的结果.