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Quasi synchronous tuning for grating feedback lasers

机译:光栅反馈激光器的准同步调谐

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A general analytical form of the round trip phase shift in grating feedback diode lasers is proposed. Using the new form, it is obvious that the round trip phase shift can be independent of rotation angle in first order approximation when only one restriction condition is met. We call this the quasi synchronous tuning (QST) condition. In the QST region, a considerably large mode hopping free tuning range can be obtained. An adjustment structure with only one freedom is needed to accurately find and locate the quasi synchronous pivot, which is not strictly confined on the grating surface and its extension. It means that the external cavity diode lasers design can be easier and the laser can be more stable and reliable.
机译:提出了光栅反馈二极管激光器中往返相移的一般分析形式。使用新形式,很明显,当仅满足一个限制条件时,往返相移可以与旋转角一阶近似无关。我们称其为准同步调整(QST)条件。在QST区域中,可以获得相当大的模式跳变自由调谐范围。仅需要一个自由度的调整结构即可准确地找到并定位准同步枢轴,该枢轴并不严格限制在光栅表面及其延伸范围内。这意味着外腔二极管激光器的设计可以更容易,并且激光器可以更加稳定和可靠。

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