Detection system based on ED-MFKL (Er<3+>-doped microfiber knot laser) and method
A micro-nano optical fiber and detection system technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of insufficient drawing length of micro-nano optical fiber, short absorption path, detection sensitivity limit, etc., and achieve simple packaging structure design, anti-electromagnetic Effects of interference, large dynamic range
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Embodiment 1
[0035] Embodiment 1 of the present invention such as image 3 As shown, an Er-doped 3+ Gas detection system for micro-nano fiber ring junction laser, including 980nm pump light source (LD) 1, wavelength division multiplexer (WDM) 2, isolator (ISO) 4, packaged ED-MFKL3, and gas processing unit. The 980nm pump light source 1 is connected to the 980nm input end of the wavelength division multiplexer (WDM) 2 through its pigtail; the common end of the wavelength division multiplexer (WDM) 2 is connected to the pigtail 14 of the packaged ED-MFKL3 ; The 1550nm end of the wavelength division multiplexer (WDM) 2 is connected to the positive input of the isolator (ISO) 4, and the other end of the isolator (ISO) 4 is connected to the gas processing unit; the gas processing unit includes a photodetector 5 , lock-in amplifier 6 and field programmable logic gate array (FPGA) processor 7, wherein the input end of photodetector 5 is connected with isolator 4, the output end of photodetector ...
Embodiment 2
[0047] Same as real-time example 1, except that the gas to be measured is ammonia, and the output laser wavelength of ED-MFKL is 1544nm.
Embodiment 3
[0049] Same as real-time example 1, except that the gas to be measured is carbon monoxide, and the output laser wavelength of ED-MFKL is 1567nm.
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