Natural polarization state single wavelength light source and method
A single-wavelength, polarization technology, applied to the field of optics, can solve the problems of low efficiency of superluminescent light-emitting diodes, low coupling efficiency of single-mode fiber, unfavorable applications, etc., and achieve the effect of simple structure, high gain and power, and convenient realization.
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[0050] Such as Figure 4 As shown, a single-wavelength natural polarization light source of the present invention is composed of a current-pumped semiconductor optical amplifier (SOA) [1], a fiber grating [2] and a polarization-independent isolator [3].
[0051] The semiconductor amplifier is used to amplify the random distribution of the polarization direction of the spontaneous radiation (ASE) to produce natural polarized light, and the fiber grating [2] reflects the back-output light of the spontaneous radiation back to the SOA [1] to narrow the output spectral width and use its The feedback increases the power of this wavelength, and the polarization-independent isolator [3] prevents the end face of the fiber output end from reflecting to form laser oscillation, ensuring the output of a natural polarization light source independent of polarization.
[0052] A piece of fiber grating [2] is connected to one end of a semiconductor optical amplifier (SOA) [1], the reflection wavelen...
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