Abstract:
A laser source (340) that generates an output beam (354) that is directed along a beam axis (354A) that is coaxial with a first axis and orthogonal to a second axis comprises a first frame (356), a laser (358), and a first mounting assembly (360). The laser (358) generates the output beam (354) that is directed along the beam axis (354A). The first mounting assembly (360) couples the laser (358) to the first frame (356). The first mounting assembly (360) allows the laser (358) to expand and contract relative to the first frame (356) along the first axis and along the second axis, while maintaining alignment of the output beam (354) so the beam axis (354A) is substantially coaxial with the first axis. The first mounting assembly (360) can include a first fastener assembly (366) that couples the laser (358) to the first frame (356), and a first alignment assembly (368) that maintains alignment of the laser (358) along a first alignment axis (370) that is substantially parallel to the first axis.
Abstract:
A sensor system for sensing the presence of methane and sulfur hexafluoride in an area includes (i) a laser assembly including a quantum cascade gain medium that generates a MIR output beam that is directed at the area; and (ii) an imager that captures a thermal image of the area when the MIR output beam is generated. To sense the presence of methane, the MIR output beam has a center wavelength that is in the range of between approximately 7.654 and 7.668 microns. Alternatively, to sense the presence of sulfur hexafluoride, the MIR output beam has a center wavelength that is in the range of between approximately 10.56 and 10.58 microns.
Abstract:
An optical fiber switch (16) for alternatively redirecting an input beam (14) comprises a redirector (18) and a redirector mover (20). The redirector (18) is positioned in the path of the input beam (14) along a directed axis (344A). The redirector (18) redirects the input beam (14) so that a redirected beam (46) alternatively launches from the redirector (18) (i) along a first redirected axis (354) that is spaced apart from the directed axis (344A) when the redirector (18) is positioned at a first position (348), and (ii) along a second redirected axis (356) that is spaced apart from the directed axis (344A) when the redirector (18) is positioned at a second position (350) that is different from the first position (348). The redirector mover (20) moves the redirector (18) about a movement axis (366) between the first position (348) and the second position (350). The redirector mover (20) includes a stator component (320A) and a rotor component (320B) that moves relative to the stator component (320A). The input beam (14) is directed along the directed axis (344A) substantially between the stator component (32A) and the redirector (18) prior to the input beam (14) being redirected by the redirector (18).
Abstract:
An optical fiber switch (16) for alternatively redirecting an input beam (14) comprises a redirector (18) and a redirector mover (20). The redirector (18) is positioned in the path of the input beam (14) along a directed axis (344A). The redirector (18) redirects the input beam (14) so that a redirected beam (46) alternatively launches from the redirector (18) (i) along a first redirected axis (354) that is spaced apart from the directed axis (344A) when the redirector (18) is positioned at a first position (348), and (ii) along a second redirected axis (356) that is spaced apart from the directed axis (344A) when the redirector (18) is positioned at a second position (350) that is different from the first position (348). The redirector mover (20) moves the redirector (18) about a movement axis (366) between the first position (348) and the second position (350). The redirector mover (20) includes a stator component (320A) and a rotor component (320B) that moves relative to the stator component (320A). The input beam (14) is directed along the directed axis (344A) substantially between the stator component (32A) and the redirector (18) prior to the input beam (14) being redirected by the redirector (18).
Abstract:
A laser assembly (10) for generating an output beam (12) includes: (i) a first laser (16) that generates a first laser beam (16A) having a first polarization state; (ii) a second laser (20) that generates a second laser beam (20A); (iii) a polarization beam combiner (24) that combines the first laser beam (16A) and the rotated second laser beam (20A) to form a combination beam (25); and (iv) an optical assembly (32) that expands and collimates the combination beam (25) to provide the output beam (12). The optical assembly (32) include an on-axis telescope plus a projection lens.
Abstract:
A method of spectral beam-combining an array of fiber optics is disclosed. Each fiber may be coupled to a high-power, wavelength-stabilized, fiber-coupled, diode-laser module and has a fiber-by-fiber pre-selected wavelength. The wavelengths may be chosen such that the array can be spectrally combined on, for example a transmission grating and re-focused into an output fiber. This approach is scalable to, for example, 10 kW power and have a beam quality sufficient for metal cutting applications.
Abstract:
An assembly (10) for generating a laser beam (12) includes a beam steering assembly (18); a laser assembly (16) that is tunable over a tunable range; and a controller (20). The laser assembly (16) generates a laser beam (12) that is directed at the beam steering assembly (18). The controller (20) dynamically controls the beam steering assembly (18) to dynamically steer the laser beam (12) as the laser assembly (16) is tuned over at least a portion of the tunable range. As a result thereof, the laser beam (12) is actively steered along a desired beam path (12A) while the wavelength of the laser beam (12) is varied.
Abstract:
A device controller (16) for directing a drive current (12A) to a device (12) includes a current driven power source (40) that is electrically connected to the device (12); and a current adjuster (22) electrically connected to the power source (40) in parallel to the device (12). The current adjuster (22) selectively adjusts the drive current (12A) directed to the device (12). For a laser (12), the current adjuster (22) can adjust the drive current (12A) to modulate a center wavelength of an illumination beam (20) generated by the laser (12).
Abstract:
An imaging microscope (12) for generating an image of a sample (10) comprises a beam source (14) that emits a temporally coherent illumination beam (20), the illumination beam (20) including a plurality of rays that are directed at the sample (10); an image sensor (18) that converts an optical image into an array of electronic signals; and an imaging lens assembly (16) that receives rays from the beam source (14) that are transmitted through the sample (10) and forms an image on the image sensor (18). The imaging lens assembly (16) can further receive rays from the beam source (14) that are reflected off of the sample (10) and form a second image on the image sensor (18). The imaging lens assembly (16) receives the rays from the sample (10) and forms the image on the image sensor (18) without splitting and recombining the rays.
Abstract:
A laser assembly (1710) for generating an assembly output beam (1712) includes a laser subassembly (1716) including a first laser module (1716A) and a second laser module (1716B), a transform assembly (1744), and a beam combiner (1746). The first laser module (1716A) emits a plurality of spaced apart first laser beams (1720A). The second laser module (1716B) emits a plurality of spaced apart second laser beams (1720B). The transform assembly (1744) is positioned in a path of the laser beams (1720A) (1720B). The transform assembly (1744) directs the laser beams (1720A) (1720B) to spatially overlap at a focal plane of the transform assembly (1744). The beam combiner (1746) is positioned at the focal plane that combines the lasers beams (1720A) (1720B) to provide a combination beam. The laser beams (1720A) (1720B) directed by the transform assembly (1744) impinge on the beam combiner (1746) at different angles.