# US 2024/0201336 A1 · WAVELENGTH CONTROL SYSTEM FOR TUNABLE LASER DIODE AND LiDAR DEVICE > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201336 A1 - Document ID: US20240201336A1 - Status: Published application - Kind: A1 - Application number: 18/215,419 - Filed: 2023-06-28 - Published: 2024-06-20 - Earliest claimed: 2022-12-14 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Changbum LEE; Woosung Kim; Changgyun Shin - Web page: https://patentgrep.com/patent/US20240201336A1 ## CPC - G01S 7/4814: {of transmitters alone} - G01S 7/4817: {relating to scanning} - G01S 7/4911: Transmitters - H01S 5/142: {which comprises an additional resonator} - H01S 5/4006: {Injection locking} - G01S 17/931: of land vehicles - H01S 5/02325: Mechanically integrated components on mount members or optical micro-benches - H01S 5/0612: {controlled by temperature} - H01S 5/0687: Stabilising the frequency of the laser - H01S 5/4087: {emitting more than one wavelength} - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL ## Abstract Provided is a wavelength control system including a wavelength tunable laser diode including at least one optical amplifier, and a processor configured to control a tunable wavelength range of the wavelength tunable laser diode by adjusting a bias current applied to the at least one optical amplifier. ## Claims ### Claim 1 A wavelength control system comprising: a wavelength tunable laser diode comprising at least one optical amplifier; and a processor configured to control a tunable wavelength range of the wavelength tunable laser diode by adjusting a bias current applied to the at least one optical amplifier. ### Claim 2 (depends on 1) The wavelength control system of claim 1, wherein the processor comprises a micro-processor. ### Claim 3 (depends on 1) The wavelength control system of claim 1, wherein the at least one optical amplifier is a semiconductor optical amplifier (SOA). ### Claim 4 (depends on 1) The wavelength control system of claim 1, wherein a center wavelength of a gain band of the at least one optical amplifier increases based on the bias current applied to the at least one optical amplifier increasing. ### Claim 5 (depends on 1) The wavelength control system of claim 1, wherein a center wavelength of a gain band of the at least one optical amplifier decreases based on the bias current applied to the at least one optical amplifier decreasing. ### Claim 6 (depends on 1) The wavelength control system of claim 1, wherein the wavelength tunable laser diode comprises a plurality of ring resonators, and wherein lengths of the plurality of ring resonators are different from each other. ### Claim 7 (depends on 6) The wavelength control system of claim 6, further comprising at least one heater spaced apart from each of the plurality of ring resonators, wherein the processor is further configured to control the tunable wavelength range of the wavelength tunable laser diode by adjusting a voltage input to the at least one heater. ### Claim 8 (depends on 6) The wavelength control system of claim 6, further comprising a monitor configured to detect an output wavelength of light output from the wavelength tunable laser diode, wherein the processor is further configured to control the bias current and a voltage input to the at least on heater by comparing a target wavelength, which is a wavelength of light targeted by the wavelength tunable laser diode, with the output wavelength. ### Claim 9 A light detection and ranging (LiDAR) device comprising: a wavelength tunable laser diode comprising at least one optical amplifier; a processor configured to control a tunable wavelength range of the wavelength tunable laser diode based on adjusting a bias current applied to the at least one optical amplifier; an optical transmitter configured to emit light generated by the wavelength tunable laser diode to outside of the LiDAR device; an optical receiver configured to receive light externally; and an optical detector configured to detect light received by the optical receiver. ### Claim 10 (depends on 9) The LiDAR device of claim 9, wherein the processor comprises a micro-processor. ### Claim 11 (depends on 9) The LiDAR device of claim 9, wherein the at least one optical amplifier is a semiconductor optical amplifier (SOA). ### Claim 12 (depends on 9) The LiDAR device of claim 9, wherein a center wavelength of a gain band of the at least one optical amplifier increases based on the bias current applied to the at least one optical amplifier increasing. ### Claim 13 (depends on 9) The LiDAR device of claim 9, wherein a center wavelength of a gain band of the at least one optical amplifier decreases based on the bias current applied to the at least one optical amplifier decreasing. ### Claim 14 (depends on 9) The LiDAR device of claim 9, further comprising at least one heater, wherein the processor is further configured to control the tunable wavelength range of the wavelength tunable laser diode by adjusting a voltage input to the at least one heater. ### Claim 15 (depends on 14) The LiDAR device of claim 14, further comprising a monitor configured to detect an output wavelength that is a wavelength of light output from the wavelength tunable laser diode, wherein the processor is further configured to control the bias current and the voltage input to the at least on heater by comparing a target wavelength, which is a wavelength of light targeted by the wavelength tunable laser diode, with the output wavelength. ### Claim 16 An electronic device comprising: a light detection and ranging (LiDAR) device comprising: a wavelength tunable laser diode comprising at least one optical amplifier; a processor configured to control a tunable wavelength range of the wavelength tunable laser diode by adjusting a bias current applied to the at least one optical amplifier; an optical transmitter configured to emit light generated by the wavelength tunable laser diode external to the LiDAR device; an optical receiver configured to receive light externally; and an optical detector configured to detect light received by the optical receiver. ### Claim 17 (depends on 16) The electronic device of claim 16, wherein the at least one optical amplifier is a semiconductor optical amplifier (SOA). ### Claim 18 (depends on 16) The LiDAR device of claim 16, wherein a center wavelength of a gain band of the at least one optical amplifier increases based on the bias current applied to the at least one optical amplifier increasing. ### Claim 19 (depends on 16) The LiDAR device of claim 16, wherein a center wavelength of a gain band of the at least one optical amplifier decreases based on the bias current applied to the at least one optical amplifier decreasing. ### Claim 20 (depends on 16) The LiDAR device of claim 16, further comprising at least one heater, wherein the processor is further configured to control the tunable wavelength range of the wavelength tunable laser diode by adjusting a voltage input to the at least one heater.