Angular spectrum adjustable random laser for high-contrast imaging
A random laser and random laser technology, applied in the field of random laser, can solve problems such as unfavorable full-field imaging, coherent speckle noise, etc., and achieve the effects of flexible coupling mode, suppression of speckle noise, and good robustness
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[0030] 1. The preparation process of the device of the present invention (see figure 1 )
[0031] (1) Dissolve 1 mg of PM567 gain dye in 0.2 mL of acetone solution to obtain an acetone solution of PM567.
[0032] (2) Mix 2 mL of PDMS and 0.235 mL of curing agent (mass ratio 10:1) to obtain a PMDS substrate.
[0033] (3) 0.04 mL of silver nanoflower water dispersion with a concentration of 5 mg / mL was mixed with the above-mentioned PDMS substrate and the acetone solution of PM567,
[0034] After stirring well, the mixture was obtained after 1 hour of vacuum.
[0035] (4) Use a micropipette to suck up 1 μL of the mixture and drop it on a laterally placed optical fiber, using surface tension and gravity to form an asymmetric microcavity,
[0036] After drying in an oven at 80 °C for four hours, an asymmetric microcavity directly coupled to the fiber was obtained.
[0037] (5) Drop multiple asymmetric microcavities on different positions of the same fiber, and use pump light t...
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