US 12,350,013 B2
Spectrometer including tunable on-chip laser and spectrum measurement method
Alexey Dmitrievich Lantsov, Lobnya (RU); Alexey Andreevich Shchekin, Moscow (RU); Sergey Nikolaevich Koptyaev, N.Tagil (RU); Alexey Grigorievich Anikanov, Moscow (RU); Maksim Vladimirovich Ryabko, Dolgoprudny (RU); Pavel Alexandrovich Ivshin, Balashiha (RU); Vasiliy Viktorovich Grigoriev, Moscow (RU); and Tatyana Igorevna Kopysova, Perm (RU)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Sep. 15, 2020, as Appl. No. 17/021,157.
Claims priority of application No. 2019134249 (RU), filed on Oct. 25, 2019; and application No. 10-2020-0074450 (KR), filed on Jun. 18, 2020.
Prior Publication US 2021/0121068 A1, Apr. 29, 2021
Int. Cl. A61B 5/00 (2006.01); G01J 3/42 (2006.01); G01N 21/39 (2006.01); A61B 5/1455 (2006.01); G01J 3/10 (2006.01)
CPC A61B 5/0075 (2013.01) [G01J 3/42 (2013.01); G01N 21/39 (2013.01); A61B 5/1455 (2013.01); G01J 2003/106 (2013.01); G01J 2003/423 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A spectrometer comprising:
a tunable on-chip laser source configured to irradiate a biological tissue with laser radiation;
a photodetector configured to receive the laser radiation reflected from the biological tissue; and
at least one processor;
wherein the tunable on-chip laser source comprises:
a semiconductor gain chip having a gain bandwidth for operating the tunable on-chip laser source in a predetermined wavelength range;
a plurality of resonator cavities connected between the semiconductor gain chip and the at least one processor, and comprising a first resonator cavity configured to radiate a light of a first wavelength band and a second resonator cavity configured to radiate a light of a second wavelength band;
wherein the first resonator cavity comprises:
a first tunable filter that comprises at least two cascaded micro-resonator cavities; and
a first mirror that provides a feedback loop between the first resonator cavity and the semiconductor gain chip, and
wherein the second resonator cavity comprises:
a second tunable filter that comprises at least two cascaded micro-resonator cavities; and
a second mirror that provides a feedback loop between the second resonator cavity and the semiconductor gain chip,
wherein the at least one processor is further configured to control the photodetector to;
measure, during a first measurement step, a spectrum of the laser radiation reflected from the biological tissue at a first wavelength interval within a first wavelength range while the biological tissue is irradiated by the laser radiation generated by the first tunable filter,
select a second wavelength range that is narrower than the first wavelength range and includes only a greatest peak intensity point from a plurality of peak intensity points of a spectrum within the first wavelength range, and
during a second measurement step subsequent to the first measurement step, measure the spectrum of the laser radiation reflected from the biological tissue at a second wavelength interval within the second wavelength range, while the biological tissue is irradiated by the laser radiation generated by the second tunable filter, and
wherein the second wavelength interval is narrower than the first wavelength interval.