Study: No need for a leaky mode at the picometer level for microtapers

https://phys.org/news/2023-05-leaky-mode-picometer-microtapers.html

"complex leaky modes speckles projected from curved microfiber taper tip determines input wavelength... solid packaging with complementary CMOS imaging sensor, single snapshot... low-cost use over long intervals maintaining accuracy and reliability... Multimode interferences generate random speckles... drawing conditions of taper maximize leaky modes generation within 1 mm... operate within 0.3-1 mm  ~1.5 pm resolution... low-cost, scalable spectrometer... 1 CIS chip to demonstrate hyperspectral imaging"