SPECTROMETER BASED ON TUNABLE LASER ON CHIP, AND SPECTRUM MEASURING METHOD Russian patent published in 2020 - IPC H01J49/02 G01N21/39 

FIELD: physics.

SUBSTANCE: spectrometer based on a tunable laser on a chip, comprises a laser radiation source for irradiating biological tissue with laser radiation, a photodetector for receiving radiation reflected from the biological tissue, having passed through the optical system, and a control and processing unit for signals received from the photodetector. Laser radiation source used is a tunable laser on a chip comprising a semiconductor amplifier and connected through an optical splitter to two or more resonators (A, B, ..., N) connected to a control and signal processing unit, wherein the semiconductor amplifier has its amplification band for operation of the tunable laser on the chip in a given wavelength range. Each of the resonators has a waveguide and tunable filters (A1, A2, B1, B2, ..., N1, N2), which provides generation of light at its output at different wavelengths (λ1, λ2, ..., λn), in accordance with parameters of tunable filters of each of resonators, wherein one of resonators A is intended for coarse high-speed measurement of the reflection spectrum R (λ) of the target when exposed to light generated by the adjustable filters A1 and A2 of the resonator, and the other of the resonators B is intended for accurate measurement of the reflection spectrum R (λ) of the target when exposed to light generated by the adjustable filters B1 and B2 of the resonator.

EFFECT: disclosed is a spectrometer based on a tunable laser on a chip.

12 cl, 12 dwg