Abstract: A laser source includes a first laser device configured to generate a first laser beam having a first wavelength, a second laser device configured to generate a second laser beam having a second wavelength, which is different from the first wavelength, and a non-linear crystal configured to receive simultaneously the first and second laser beams and to generate a third laser beam that has a third wavelength, which is larger than each of the first and second wavelengths. The non-linear crystal has a length and a width, and a variable poling period is distributed across the width so that the third wavelength varies within a given wavelength range based on an incident position of the first and second laser beams along the width of the non-linear crystal.

Abstract: A laser-based detection and analysis system for detecting plural members of volatile organic compounds includes a measuring unit configured to simultaneously measure a spectrum of the plural members of the volatile organic compounds located in a measuring chamber, with a laser beam having a wavelength of about 3.3 ?m, and a data processing unit including a deep neural network, DNN, configured to process the spectrum measured by the measuring unit and to output an individual concentration of each of the plural members of the volatile organic compounds. The DNN is configured to update a weight Wk for each member of the plural members by using hidden layers having plural nodes, each node having an activation function and an optimizer.

Abstract: A laser-based detection system that includes a laser device configured to emit a laser beam; a measuring chamber configured to receive in an internal cavity ambient air and the laser beam, wherein the measuring chamber is configured to bounce the laser beam inside the internal cavity multiple times; and a photosensor configured to receive an output laser beam from the measuring chamber.

Abstract: A laser source includes a first laser device configured to generate a first laser beam having a first wavelength, a second laser device configured to generate a second laser beam having a second wavelength, which is different from the first wavelength, and a non-linear crystal configured to receive simultaneously the first and second laser beams and to generate a third laser beam that has a third wavelength, which is larger than each of the first and second wavelengths. The non-linear crystal has a length and a width, and a variable poling period is distributed across the width so that the third wavelength varies within a given wavelength range based on an incident position of the first and second laser beams along the width of the non-linear crystal.

Abstract: A system and method for rapid thermometry using intrapulse spectroscopy can include a laser for propagating pulses of electromagnetic radiation to a region. Each of the pulses can be chirped. The pulses from the region can be detected. An intrapulse absorbance spectrum can be determined from the pulses. An instantaneous temperature of the region based on the intrapulse absorbance spectrum can be determined.

Abstract: A system and method for cavity ring-down spectroscopy can include a pulsed quantum cascade laser, an optical ring-down cavity, a photodetector, and an oscilloscope. The system and method can produce pulse widths of less than 200 ns with bandwidths greater than 300 pm, as well as provide temporal resolution of greater than 10 ?s.

Abstract: Application supervised access to managed content is disclosed. In some embodiments, a free form ACL is defined to delegate to one or more users and/or groups of users an access right or restriction a content manage system is not configured to understand and/or enforce. In some embodiments, if a user requests that an application perform an operation with respect to a content item, the application queries a content management system to determine whether the user has been granted the right to perform the requested operation with respect to the content item. The authoring application then allows or disallows the requested operation based at least in part on the information provided by the content management system.

Abstract: An ammonia sensor can include a laser detector configured to provide stable sample readings. The sensor can implement a method including processing the recorded intensity of the laser beam to determine a first harmonic component and a second harmonic component and the amount of ammonia in the sample.

Abstract: A system and method for rapid thermometry using intrapulse spectroscopy can include a laser for propagating pulses of electromagnetic radiation to a region. Each of the pulses can be chirped. The pulses from the region can be detected. An intrapulse absorbance spectrum can be determined from the pulses. An instantaneous temperature of the region based on the intrapulse absorbance spectrum can be determined.

Abstract: A system and method for cavity ring-down spectroscopy can include a pulsed quantum cascade laser, an optical ring-down cavity, a photodetector, and an oscilloscope. The system and method can produce pulse widths of less than 200 ns with bandwidths greater than 300 pm, as well as provide temporal resolution of greater than 10 ?s.

Abstract: An ammonia sensor can include a laser detector configured to provide stable sample readings.

Abstract: Restricting access to managed content to users that are both (1) members of one or more required groups identified in an ACL associated a content item to which access is requested and (2) otherwise granted access under the ACL, e.g., by virtue of their individual identity, role, or group membership is disclosed. In some embodiments, an ACL is configured to identify one or more groups as being a “required” group, membership in which is required for a user to be granted access to a content item with which the ACL is associated. If a user is not a member of a required group, the user is denied access (or denied access above a certain level), even if the user is otherwise delegated access rights in the ACL.

Abstract: Restricting access to managed content to users that are both (1) members of one or more required groups identified in an ACL associated a content item to which access is requested and (2) otherwise granted access under the ACL, e.g., by virtue of their individual identity, role, or group membership is disclosed. In some embodiments, an ACL is configured to identify one or more groups as being a “required” group, membership in which is required for a user to be granted access to a content item with which the ACL is associated. If a user is not a member of a required group, the user is denied access (or denied access above a certain level), even if the user is otherwise delegated access rights in the ACL.

Abstract: Restricting access to managed content to users that are both (1) members of one or more required groups identified in an ACL associated a content item to which access is requested and (2) otherwise granted access under the ACL, e.g., by virtue of their individual identity, role, or group membership is disclosed. In some embodiments, an ACL is configured to identify one or more groups as being a “required” group, membership in which is required for a user to be granted access to a content item with which the ACL is associated. If a user is not a member of a required group, the user is denied access (or denied access above a certain level), even if the user is otherwise delegated access rights in the ACL.