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1. 发明公开

EP4386472A1 NEAR INFRARED PULSED LIGHT SOURCE AND TERAHERTZ WAVE GENERATION DEVICE 审中-实审
公开(公告)号：EP4386472A1
公开(公告)日：2024-06-19
申请号：EP21958355.6
申请日：2021-09-22
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： HIROSAWA, Kenichi , NISHIDA, Mio , HASEGAWA, Kiyotomo , NOTAKE, Takashi , MINAMIDE, Hiroaki
IPC分类号： G02F1/01 , G02F1/39 , H01S3/00 , H01S3/10
CPC分类号： G02F1/39 , H01S3/00 , G02F1/01 , H01S3/10
摘要： Disclosed is a near-infrared pulsed light source 10A including: a first near-infrared light source 11 to emit near-infrared laser light which is a continuous wave of wavelength longer than 1,240nm; and a pulse modulator to modulate the near-infrared laser light from the first near-infrared light source 11 with pulses, and to emit, as first near-infrared light, near-infrared pulsed light whose pulse width is less than or equal to one nanosecond, and whose extinction ratio is greater than or equal to a value which is a result of adding 10dB to a pulse duty ratio (dB) which is a ratio of a pulse width of each of the pulses and a period of the pulses.

2. 发明公开

EP4266081A1 LIDAR DEVICE AND TRANSMISSION/RECEPTION SEPARATION DEVICE 审中-实审
公开(公告)号：EP4266081A1
公开(公告)日：2023-10-25
申请号：EP21922830.1
申请日：2021-01-28
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： NISHIDA, Mio , HIROSAWA, Kenichi , YANAGISAWA, Takayuki
IPC分类号： G01S7/481 , G01S17/58 , G01S17/95
摘要： Herein disclosed is a LiDAR device including: a light source (1) to output laser light; a demultiplexer/distributor (2) to receive the laser light output from the light source (1) and to output local oscillation light and a plurality of signal light beams; a plurality of amplifiers (5) corresponding to the respective signal light beams output from the demultiplexer/distributor (2), the plurality of amplifiers (5) being configured to amplify the respective signal light beams; a plurality of light transmission/reception devices (7) corresponding to the respective amplifiers (5), to emit, as transmission light, the signal light beams output from the corresponding amplifiers (5) into space, and to receive, as reception light, scattered light from a measurement target present in space; a signal processing device (8) to calculate a distance to the measurement target and a property of the measurement target on a basis of the reception light from the plurality of light transmission/reception devices (7) and the local oscillation light from the demultiplexer/distributor (2); and a plurality of transmission/reception separation devices (6) corresponding to the respective amplifiers (5) and the respective light transmission/reception devices (7), the plurality of transmission/reception separation devices (6) being configured to couple the transmission light from the amplifiers (5) to the respective light transmission/reception devices (7) and to couple the reception light received by the respective light transmission/reception devices (7) to the corresponding signal processing device (8).

3. 发明公开

EP4064467A1 PLANAR WAVEGUIDE AMPLIFIER AND LASER RADAR DEVICE 有权
公开(公告)号：EP4064467A1
公开(公告)日：2022-09-28
申请号：EP19956930.2
申请日：2019-12-18
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： HIROSAWA, Kenichi , SAMEJIMA, Narito , UTO, Kenichi
IPC分类号： H01S3/00 , H01S3/06 , H01S3/10 , H01S3/17
摘要： A planar waveguide amplifier (1) includes a planar waveguide (7) including a flat plate-like core (71); a first cladding (72) provided on a first principal face of the core (71); and a second cladding (72) provided on a second principal face of the core (71), and signal light (A) and pumping light (B) travel into the planar waveguide (7) so that the signal light (A) and the pumping light (B) propagate inside the core (71) in such a manner that optical paths of the signal light (A) and the pumping light (B) overlap each other, and in a zig-zag manner, and the core (71) is an amplification medium containing a rare-earth element serving as an active ion of a three-level system, and absorbs the signal light (A) on the basis of a reduction in intensity of the pumping light (B).

4. 发明公开

EP3712687A1 OPTICAL PATTERN GENERATION DEVICE 有权
公开(公告)号：EP3712687A1
公开(公告)日：2020-09-23
申请号：EP17936812.1
申请日：2017-12-26
申请人： Mitsubishi Electric Corporation
发明人： TAKADA, Yukari , HIROSAWA, Kenichi , YANAGISAWA, Takayuki
IPC分类号： G02B27/42 , G02B5/18
摘要： Alight pattern generator of the present disclosure includes: a laser light source to output laser light; a condenser lens to refract the laser light outputted from the laser light source; a mask to absorb or reflect part of the refracted light outputted from the condenser lens, the mask transmitting the rest of the refracted light; and a diffractive optical element to change a phase of the transmitted light in accordance with a position on a plane perpendicular to a direction in which the light transmitted through the mask travels and to output light having a phase distribution to form a light pattern, wherein the condenser lens is placed at a first position which is the condenser lens's focal length distant from the laser light source. This configuration makes it possible to form a plurality of types of light patterns by using a single diffractive optical element.

5. 发明公开

EP3896804A1 LASER AMPLIFIER 有权
公开(公告)号：EP3896804A1
公开(公告)日：2021-10-20
申请号：EP19909111.7
申请日：2019-01-08
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： MIYAGI, Yukari , HIROSAWA, Kenichi
IPC分类号： H01S3/063
摘要： A laser amplifier (300) includes a planar optical waveguide (100) for laser amplification, and an input optical system (200) for inputting signal light to a core layer (1) of the planar optical waveguide (100). The input optical system (200) includes: a collimating lens (4) for converting output light from a signal light source (3) into parallel light; an anamorphic prism (5) for reducing the beam width in a first direction of output light from the collimating lens (4); and a cylindrical lens (6) for collecting output light from the anamorphic prism (5) in a second direction, and output light from the cylindrical lens (6) is input to the core layer (1).

6. 发明公开

EP3244498A1 ARRAY TYPE WAVELENGTH CONVERTING LASER DEVICE 有权
标题翻译：阵列式波长转换激光装置
公开(公告)号：EP3244498A1
公开(公告)日：2017-11-15
申请号：EP16735100.6
申请日：2016-01-08
申请人： Mitsubishi Electric Corporation
发明人： SHOHDA, Fumio , YANAGISAWA, Takayuki , HIROSAWA, Kenichi , KANNARI, Fumihiko
IPC分类号： H01S5/40 , G02F1/37 , G02F1/377 , H01S3/042 , H01S3/063 , H01S3/0941 , H01S5/14
摘要： A device includes: at least one laser element (1) with light emitting points to output fundamental waves in a one-dimensional array; a wavelength converting element (2) to carry out wavelength conversion of the incident fundamental waves, and to output wavelength converted light rays; and an output mirror (3) to reflect the fundamental waves, and to transmit the wavelength converted light rays resulting from the wavelength conversion by the wavelength converting element (2). The wavelength converting element (2) is disposed between the laser element (1) and the output mirror (3), and the distance between the position of a waist (103) of the fundamental waves output from the laser element (1) and the output mirror (3) is set in accordance with a Talbot condition under which the adjacent light emitting points cause phase synchronization with each other.
摘要翻译：一种装置包括：至少一个激光元件（1），其具有用于以一维阵列输出基波的发光点; 波长转换元件（2），用于对入射的基波进行波长转换，并输出经波长转换的光线; 和输出反射镜（3），用于反射基波，并且透射由波长转换元件（2）进行波长转换所产生的波长转换光线。波长转换元件（2）设置在激光元件（1）和输出镜（3）之间，激光元件（1）输出的基波的腰部位置（103）与激光元件输出反射镜（3）根据Talbot条件来设置，在所述Talbot条件下相邻的发光点彼此导致相位同步。

7. 发明公开

EP3730977A1 DIFFRACTIVE OPTICAL COMPONENT AND OPTICAL PATTERN GENERATION DEVICE 审中-公开
公开(公告)号：EP3730977A1
公开(公告)日：2020-10-28
申请号：EP18899101.2
申请日：2018-01-11
申请人： Mitsubishi Electric Corporation
发明人： TAKADA, Yukari , HIROSAWA, Kenichi , KAMEYAMA, Shumpei
IPC分类号： G02B5/18 , G02B27/42
摘要： A diffractive optical element according to the present disclosure includes: a plurality of diffractive optical element segments, each diffractive optical element segment having an asperity shape on the segment's surface to vary phases of light entering the segment according to positions on the segment's surface which the light enters, the each diffractive optical element segment projecting, when the light enters, light having a phase distribution to form a light pattern, wherein the diffractive optical element segments are arranged on a same plane and have, on their surfaces, asperity shapes which are different from each other and correspond to respective light patterns different from each other, the light patterns being formed by light's entering the respective diffractive optical element segments, and wherein the diffractive optical element segments are arranged in respective regions on the diffractive optical element, which are partitioned by lines radially extending from a center of the diffractive optical element to a circumference thereof. By the above configuration, it becomes possible to produce a plurality of light patterns and switch between the light patterns, using a single diffractive optical element.

8. 发明授权

EP3244498B1 ARRAY TYPE WAVELENGTH CONVERTING LASER DEVICE 有权
公开(公告)号：EP3244498B1
公开(公告)日：2019-12-25
申请号：EP16735100.6
申请日：2016-01-08
申请人： Mitsubishi Electric Corporation
发明人： SHOHDA, Fumio , YANAGISAWA, Takayuki , HIROSAWA, Kenichi , KANNARI, Fumihiko
IPC分类号： G02F1/377 , H01S3/0941 , H01S5/14 , H01S3/08 , H01S3/109 , H01S3/13 , H01S3/10 , H01S3/094 , G02F1/37 , H01S3/23 , H01S3/063 , H01S3/042 , H01S3/04 , H01S5/40

9. 发明公开

EP3460545A1 PLANAR WAVEGUIDE 有权
公开(公告)号：EP3460545A1
公开(公告)日：2019-03-27
申请号：EP16905420.2
申请日：2016-06-14
申请人： Mitsubishi Electric Corporation
发明人： HIROSAWA, Kenichi , YANAGISAWA, Takayuki
IPC分类号： G02B6/122
摘要： Disclosed is a planar waveguide including: a core (11) which is a flat plate through which light propagates; a cladding (12) which is a flat plate for reflecting the light in a state of being joined to an upper surface of the core (11); and a cladding (13) which is a flat plate for reflecting the light in a state of being joined to a lower surface of the core (11), in which each of the claddings (12) and (13) is a multilayer film in which multiple films made from different materials are layered. As a result, a material having a low index of refraction can be used as the material of the core (11), and the limit on materials usable as the material of the core (11) is relaxed.

10. 发明公开

EP3435141A1 PARALLEL LIGHT GENERATION DEVICE 有权
公开(公告)号：EP3435141A1
公开(公告)日：2019-01-30
申请号：EP16900479.3
申请日：2016-04-28
申请人： Mitsubishi Electric Corporation
发明人： SAKAI, Kohei , TAKADA, Yukari , SHOHDA, Fumio , HIROSAWA, Kenichi , YANAGISAWA, Takayuki
IPC分类号： G02B27/30 , G02B3/06
摘要： A lens (10) has an incidence surface (11) having a cylindrical shape and forming a concave shape, and an emitting surface (12) forming a convex shape with respect to an optical axis (10a) . A light source (20) has a large divergence angle in a vertical direction, and a divergence angle in a horizontal direction which is smaller than that in the vertical direction. The light source (20) is located at a position of focal length of the lens (10) in the vertical direction on a side of the incidence surface. The horizontal direction of the light source (20) is aligned with a curvature direction of the cylindrical shape of the lens (10).

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