A system is disclosed which includes a laser which has a calibrated optical power and a calibrated tolerance. The system includes a driving circuit configured to generate a first current pulse and a second current pulse. The system includes a primary observer module configured to observe a first and second primary input. The system includes one or more secondary observer modules configured to observe one or more first and one or more second secondary inputs. The system includes a controller communicatively coupled to the laser, driving circuit, primary observer module, and the one or more secondary observer modules. The controller is configured to receive an information packet, calculate an optical power, determine a deviation of the optical power from the calibrated optical power, compare the deviation with the calibrated tolerance, and perform an action if the deviation exceeds the calibrated tolerance.

A burst logging system logs and transmits to a local or remote computing system event data related to errors in and or potential failures of laser system components. The system further provides for capturing data at different rates from different sensors, synchronization of data capture associated with system events and the possibility for aggregation of data from multiple systems, which can in turn be leveraged to predict and or remediate future system events.

The present disclosure relates to optical fiber amplifying systems having operability at a wide variety of ambient temperatures and to methods for using them. One aspect of the disclosure is an optical fiber system configured to provide amplified radiation. The system includes an active optical fiber; a plurality of grating-locked pump sources, each having an output optically coupled to the active optical fiber; one or more temperature sensors, configured to measure a temperature associated with one or more of the grating-locked pump sources; and a control system configured to accept measurements from the one or more temperature sensors and, for a desired total pump power output, to provide to one or more of the grating-locked pump sources a set of drive currents suitable to provide the desired total pump power output.

A method for generating pulsed laser radiation in the spectral range from 860 nm to 1000 nm is disclosed, including the steps of generating pulsed laser radiation in the spectral range from 1500 nm to 1600 nm, preferably at a wavelength of 1560 nm; shifting the wavelength of the pulsed laser radiation to a longer wavelength of at least 1720 nm, and preferably to 1840 nm; amplifying the wavelength-shifted pulsed laser radiation in a Thulium-doped gain medium so that the Thulium-doped gain medium is pumped in an in-band pumping scheme; and frequency-doubling the amplified wavelength-shifted pulsed laser radiation. A laser system suitable for practicing the method is also disclosed.

Apparatuses and methods are disclosed for applying laser energy having desired pulse characteristics, including a sufficiently short duration and/or a sufficiently high energy for the photomechanical treatment of skin pigmentations and pigmented lesions, both naturally-occurring (e.g., birthmarks), as well as artificial (e.g., tattoos). The laser energy may be generated with an apparatus having a resonator with the capability of switching between a modelocked pulse operating mode and an amplification operating mode. The operating modes are carried out through the application of a time-dependent bias voltage, having waveforms as described herein, to an electro-optical device positioned along the optical axis of the resonator.

A laser system and method generate milliwatt-power pump light by a fiber-coupled laser diode with a single-mode integrated fiber housed in a pump enclosure. The milliwatt-power pump light is conveyed from the single-mode integrated fiber out of the first enclosure into one end of a single-mode fiber cable that is external to the pump enclosure. The milliwatt-power pump light is conveyed from an opposite end of the external single-mode fiber cable into one end of a single-mode resident fiber disposed internally within a laser-head enclosure. A crystal housed in the laser-head enclosure is pumped with the milliwatt-power pump light that exits into free space from an opposite end of the single-mode resident fiber onto a face of the crystal, to produce stable milliwatt-power single-mode laser light having a frequency stability of less than 3 MHz per minute. The stable milliwatt-power single-mode laser light is emitted from the laser-head enclosure.

A laser projection module, a depth camera and an electronic device are provided. The laser projection module includes a laser emitter, a collimation element, a diffractive optical element and a temperature detection element. The laser emitter is configured to emit laser. The collimation element is arranged in a laser emission direction of the laser emitter and configured to collimate the laser. The diffractive optical element is arranged in a position subsequent to the collimation element along the laser emission direction of the laser emitter, and configured to diffract the laser collimated by the collimation element to form a laser pattern. The temperature detection element is arranged adjacent to the laser emitter and configured to detect a temperature of the laser emitter.

A laser device for skin treatment includes: a laser generating unit including a diode laser for generating a pulse capable of being varied to a pulse width of 100 picoseconds (ps) to 2000 ps by a dedicated driver having a rising time of 100 ps or less and a pulse width adjustment unit for adjusting a width of the pulse generated by the diode laser, the laser generating unit configured to generate a single or a plurality of pulses; and a laser amplifying unit including a pumping lamp and a single or a plurality of amplification mediums having a rod structure for absorbing light energy from the pumping lamp, wherein, in the laser amplifying unit, a pulse supplied from the laser generating unit passes through at least one of the single or a plurality of amplification mediums a plurality of times inward from the outside and is gradually amplified.

According to a laser beam output apparatus, a pulsed laser output section outputs a laser beam having a predetermined wavelength as first pulses. An optical path determining section receives the first pulses and determines one among a plurality of optical paths for each of the first pulses for output. A parallelizing section parallelizes the traveling direction of light beams traveling, respectively, through the plurality of optical paths. A wavelength changing section receives outputs from the parallelizing section and changes the outputs to have their respective different wavelengths for output. A focusing section receives and focuses outputs from the wavelength changing section. An optical fiber receives an output from the focusing section at a core end face. The focusing section is arranged to focus the outputs from the wavelength changing section on the core end face.

Provided is an image acquiring device for easily acquiring a hyper spectral image in a small device and enhancing wavelength resolution, the device which includes a light source portion and a sensor portion. The light source portion includes an emitter portion having a plurality of groups of emitters configured to emit light of different wavelengths, a circuit portion dividing the emitter portion into a plurality of segments and configured to control the plurality of segments independently, and a driver portion configured to control the circuit part so that the plurality of segments are driven at different strengths or at different times.