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1. 发明公开

EP3916935A1 EDGE-EMITTING LASER DIODE WITH IMPROVED POWER STABILITY 有权
公开(公告)号：EP3916935A1
公开(公告)日：2021-12-01
申请号：EP21172853.0
申请日：2021-05-07
申请人： Exalos AG
发明人： CASTIGLIA, ANTONINO FRANCESCO , ROSSETTI, MARCO , MALINVERNI, MARCO , DÜLK, MARCUS , VELEZ, CHRISTIAN
IPC分类号： H01S5/0625 , H01S5/10 , G02B27/01 , H04N9/31 , H01S5/06 , H01S5/40
摘要： A laser diode chip (15) comprising a bias-dependent absorber section and a lasing section (23 1 and 23 2 ). The laser diode can be operated at low or high slope efficiency depending on the desired power stability and output power characteristics. The absorber and lasing sections (23 1 and 23 2 ) are arranged in series between end facets (22, 24) and share a common ridge waveguide (26) but have independent optical cavities separated by an intermediate monolithic mirror (25) which has a dual function of forming the output coupler for the back section and the back reflector for the front section. The bias in each section is independently controllable by section-specific electrodes (21 1 and 21 2 ). The two sections (23 1 and 23 2 ) share the same epitaxial structure. The absorber section may be at the front and the lasing section at the back or vice versa.

2. 发明公开

EP4345923A1 WAVELENGTH-STABILIZED BROADBAND LIGHT SOURCE 审中-公开
公开(公告)号：EP4345923A1
公开(公告)日：2024-04-03
申请号：EP23195914.9
申请日：2023-09-07
申请人： Exalos AG
发明人： DÜLK, MARCUS
IPC分类号： H01L33/00 , H04B10/572
摘要： A light source module (100) with integrated wavemeter components (460, 494, 495) for stabilizing the output power and wavelength of a superluminescent diode or other broadband semiconductor light source (121) outputting a broadband output beam. A portion of the source output beam is directed to an optical edge filter (460) with a cross-over wavelength lying within the bandwidth of the output beam. The edge filter (460) divides the light it receives into a short-wavelength component and a long-wavelength component. These two components are then directed onto respective photodetectors (494, 495) that output respective signals to a wavemeter controller. The controller adjusts the drive current and/or temperature of the source to maintain the mean wavelength of the source's output beam at a set constant value according to a control parameter determined from a combination of the photodetector signals such as their ratio or the ratio between their difference and sum.

3. 发明公开

EP4339686A1 COMPACT LIGHT SOURCE MODULE 审中-公开
公开(公告)号：EP4339686A1
公开(公告)日：2024-03-20
申请号：EP23195704.4
申请日：2023-09-06
申请人： Exalos AG
发明人： DÜLK, MARCUS , PRIMEROV, NIKOLAY
IPC分类号： G02B27/01 , G02B27/09 , G02B27/10 , G02B27/14
摘要： A light source module (50) comprising a plurality of semiconductor emitters (110, 120, 130), each configured to emit a beam at a different peak emission wavelength. Each beam is divergent with a more divergent, fast axis and a less divergent, slow axis. First single-axis focusing elements (511, 521, 531) focus the beams from respective emitters in one of the fast and slow axis while the beams remain divergent in the other of the fast and slow axis. A beam combiner (240) based on dichroic mirrors (122, 132) is arranged to bring the beams from the individual first single-axis focusing elements into a common optical axis. A common second single-axis focusing element (750) is arranged to focus the combined beams output from the beam combiner in the other of the fast and slow axis which are then output from the light source module.

4. 发明公开

EP3913753A1 EDGE-EMITTING LASER DIODE WITH IMPROVED POWER STABILITY 审中-公开
公开(公告)号：EP3913753A1
公开(公告)日：2021-11-24
申请号：EP21172851.4
申请日：2021-05-07
申请人： Exalos AG
发明人： CASTIGLIA, ANTONINO FRANCESCO , ROSSETTI, MARCO , MALINVERNI, MARCO , DÜLK, MARCUS , VELEZ, CHRISTIAN
IPC分类号： H01S5/065 , G02B27/01 , H01S5/10 , H01S5/40 , H01S5/028
摘要： An edge-emitting semiconductor laser diode chip (15) with mutually opposed front and back end facet mirrors (22, 24). First and second ridges (26 1 , 26 2 ) extend between the chip end facets (22, 24) to define first and second waveguides in an active region layer (14). Low and high slope efficiency laser diodes (LD L , LD H ) are thus formed that are independently drivable by respective electrode pairs (21 1 , 23 1 and 21 2 , 23 2 ). The single chip (15) thus incorporates two laser diodes sharing a common heterostructure, one with low slope efficiency optimized for low power operation with good power stability against temperature variations and random threshold current fluctuations in the close-to-threshold power regime, and the other with high slope efficiency optimized for high wall plug efficiency operation at higher output powers when the chip is operating far above threshold.

5. 发明公开

EP4231469A1 MONOLITHIC EDGE-EMITTING SEMICONDUCTOR DIODE ARRAYS 审中-实审
公开(公告)号：EP4231469A1
公开(公告)日：2023-08-23
申请号：EP22208401.4
申请日：2022-11-18
申请人： Exalos AG
发明人： ROSSETTI, MARCO , DÜLK, MARCUS , CASTIGLIA, ANTONINO FRANCESCO , MALINVERNI, MARCO , VELEZ, CHRISTIAN
IPC分类号： H01S5/042 , H01S5/40
摘要： A monolithic edge-emitting semiconductor diode array chip (100) comprises
a one-dimensional array (70) of diode emitters (50), such as laser diodes, superluminescent diodes or semiconductor optical amplifiers. Semiconductor layers are arranged on a conductive substrate (1) and include active region layers (14) arranged between upper and lower cladding layers (12, 16) and separation layers (4, 5) arranged between the conductive substrate (1) and the lower cladding layer (16). The diode emitters (50) are formed by respective ridges (9) that are separated by trenches (25) which are sufficiently deep to penetrate into the separation layers (4, 5). Each diode (50) has its own upper and lower contacts (22, 24) that allow each diode (50) to be independently drivable with a current source driver circuit connected to push a modulated push current through its associated diode and/or a current sink connected to extract a modulated pull current through its associated diode.

6. 发明公开

EP3671109A3 SOURCE MODULE AND OPTICAL SYSTEM FOR LINE-FIELD IMAGING 审中-公开
公开(公告)号：EP3671109A3
公开(公告)日：2020-09-16
申请号：EP19211537.6
申请日：2019-11-26
申请人： Exalos AG
发明人： GINNER, LAURIN , LEITGEB, RAINER , DÜLK, MARCUS
IPC分类号： G01B9/02 , G02B27/09 , H01S5/00 , G02B19/00
摘要： A source module suitable for an optical coherence tomography system. The source module comprises a source 1 operable to emit a divergent, source output beam either of circular cross-section (e.g. as output by a vertical cavity surface emitting laser) or of elliptical cross-section (e.g. as output by an edge-emitting semiconductor laser or diode). Collimation optics 3 are provided to convert the source output beam into a non-divergent, collimated beam 4 of elliptical cross-section having a major axis and a minor axis. A cylindrical lens 6 is arranged with its piano axis aligned with the major axis of the elliptical collimated beam and its power axis aligned with the minor axis of the elliptical collimated beam so as to form a line focus extending along the major axis of the elliptical collimated beam.

7. 发明公开

EP3691062A1 AMPLIFIED STIMULATED EMISSION SEMICONDUCTOR SOURCE 有权
公开(公告)号：EP3691062A1
公开(公告)日：2020-08-05
申请号：EP19216205.5
申请日：2019-12-13
申请人： Exalos AG
发明人： DÜLK, MARCUS
IPC分类号： H01S5/50
摘要： An amplified stimulated emission, ASE, source device combining a superluminescent light emitting diode, SLED, with a semiconductor optical amplifier, SOA, the SLED and SOA being arranged in series so that the SLED acts as a seed and the SOA acts as a broadband amplifier for the SLED output. Both SLED and SOA have a structure made up of a succession of epitaxial semiconductor layers which form a waveguide comprising a core of active region layers and surrounding cladding layers. The SLED and SOA confinement factors of the SLED and SOA, wherein confinement factor is the percentage of the optical mode power in the active region layers, is designed so that the SLED confinement factor is greater than that of the SOA by at least 20%. This allow higher power outputs, because the SLED power limits imposed by the onset of non-linear effects and catastrophic optical damage can be circumvented.

8. 发明公开

EP3671109A2 SOURCE MODULE AND OPTICAL SYSTEM FOR LINE-FIELD IMAGING 审中-公开
公开(公告)号：EP3671109A2
公开(公告)日：2020-06-24
申请号：EP19211537.6
申请日：2019-11-26
申请人： Exalos AG
发明人： GINNER, LAURIN , LEITGEB, RAINER , DÜLK, MARCUS
IPC分类号： G01B9/02 , G02B27/09 , H01S5/00 , G02B19/00
摘要： A source module suitable for an optical coherence tomography system. The source module comprises a source 1 operable to emit a divergent, source output beam either of circular cross-section (e.g. as output by a vertical cavity surface emitting laser) or of elliptical cross-section (e.g. as output by an edge-emitting semiconductor laser or diode). Collimation optics 3 are provided to convert the source output beam into a non-divergent, collimated beam 4 of elliptical cross-section having a major axis and a minor axis. A cylindrical lens 6 is arranged with its piano axis aligned with the major axis of the elliptical collimated beam and its power axis aligned with the minor axis of the elliptical collimated beam so as to form a line focus extending along the major axis of the elliptical collimated beam.

9. 发明公开

EP3454101A1 DEPOLARISER 有权
公开(公告)号：EP3454101A1
公开(公告)日：2019-03-13
申请号：EP18192138.8
申请日：2018-09-01
申请人： Exalos AG
发明人： DÜLK, MARCUS , VORREAU, PHILIPP
IPC分类号： G02B6/27 , G02F1/01
摘要： A depolariser for a broadband optical source to split the source beam by power, not by polarisation state, and route the components into respective light paths. A polarisation rotator arranged in one of the light paths rotates the polarisation state of that beam component to make it orthogonal to that of the other. The components are then recombined by a combiner and output. A variable optical attenuator is arranged in one of the light paths, which during operation is adjusted by a controller to maintain power equalisation between the light paths and hence depolarisation performance. The controller receives power measurements from the light paths and from after the combiner via respective sensors. With this feedforward design reminiscent of a Mach-Zehnder interferometer the light from a light source which generates highly polarised light can be depolarised in theory with zero insertion loss and in practice with losses of about 1 dB.

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