US 12,135,376 B2
LiDAR detection methods and systems with FBG filter
Andrey Victorovich Golikov, Moscow (RU); Nikolay Evgenievich Orlov, Sarapul (RU); and Dmitry Valentinovich Solomentsev, Moscow (RU)
Assigned to Y.E. Hub Armenia LLC, Yerevan (AM)
Filed by YANDEX SELF DRIVING GROUP LLC, Moscow (RU)
Filed on Dec. 7, 2020, as Appl. No. 17/113,876.
Claims priority of application No. RU2019143309 (RU), filed on Dec. 23, 2019.
Prior Publication US 2021/0190959 A1, Jun. 24, 2021
Int. Cl. G01S 17/931 (2020.01); G01S 17/42 (2006.01); G01S 17/89 (2020.01); G01S 7/481 (2006.01)
CPC G01S 17/931 (2020.01) [G01S 17/42 (2013.01); G01S 17/89 (2013.01); G01S 7/4818 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A LiDAR method for detecting objects in a region of interest, the method being implemented by a processor communicatively connected to a LiDAR system, the method comprising:
causing a radiation source to emit an output beam in a transmission optical fiber towards the region of interest;
capturing an input beam in a return optical fiber of a detection system of the LiDAR system, the input beam comprising a desired portion having a wavelength corresponding to a pre-determined wavelength of the output beam, and a noise portion having wavelengths outside of the pre-determined wavelength,
separating the desired portion of the input beam from the noise using a Fiber Bragg Grating filter integrated in a core of the return optical fiber;
detecting the desired portion of the input beam by a detector, the detector comprising a single broadband detector, the desired portion of the input beam being reflected by the Fiber Bragg Grating filter selectively along at least one of the transmission optical fiber and the return optical fiber, and
wherein the transmission optical fiber and return optical fiber are connected by an optical circulator.