A wiring base includes a base having a first surface, at least one metal layer positioned on the first surface, at least one lead terminal positioned on the metal layer, and a joining member that is positioned on the metal layer and joins the lead terminal to the metal layer. The lead terminal has a first portion to be in contact with the joining member and also has a second portion being continuous with the first portion. In a cross section of the lead terminal orthogonal to a longitudinal direction of the lead terminal, the first portion has two concave surfaces that are formed near the metal layer so as to be disposed opposite to each other across a center in a transverse direction of the lead terminal.

A driving and stabilization system for a pump laser, and a pump laser system. The driving and stabilization system includes a constant current stabilization device, a constant temperature stabilization device, a power detection device, an environment detection device, and a control device. The constant current stabilization device includes a voltage comparison circuit, a constant current driving circuit, and a switch protection circuit. The constant temperature stabilization device includes an internal constant temperature stabilization circuit and an external constant temperature stabilization circuit.

A solid state laser apparatus includes a plurality of cold heads, a cooling apparatus, laser media and a seed light source. The cooling apparatus is configured to cool the plurality of cold heads. The laser media are arranged in contact with each of the plurality of cold heads, and configured to amplify a first laser beam and reflect the first laser beam. The seed light source is configured to irradiate a first laser medium of the laser media with the first laser beam. The first laser medium is arranged on a first of the cold heads. The laser media are configured to reflect the first laser beam irradiated to the first laser medium to a second laser medium of the laser media. The second laser medium is arranged on a second of the cold heads. The cold heads are configured to cool the laser media.

Configurations and method fabrication are disclosed for vapor cells used in atomic sensors. In particular vapor cells that include optical resonators. The disclosed configurations can utilize the optical resonance inside the vapor cells to enhance the interaction between laser beams and atoms contained in the vapor cell and enable controlling the temperature of the vapor cell.

In a draw tower for producing a length of optical fiber, a preform feed accepts a preform into the draw tower and a furnace downstream of the preform feed heats the preform. Fiber shaping hardware downstream of the thermal furnace is controlled by fiber shaping control electronics to produce along the fiber at least one low-absorption fiber section having a first cross-sectional geometry of the inner cladding layer corresponding to a first level of absorption of input pump light from the inner cladding layer to the core and at least one high-absorption fiber section having a second cross-sectional geometry of the inner cladding layer corresponding to a second level of absorption of input pump light from the inner cladding layer to the core that is greater than the first level of absorption. A tractor downstream of shaping hardware pulls the preform through the furnace and shaping hardware.

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.

Systems and methods are described for producing an amplitude-modulated laser pulse train. The laser pulse train can be used to cause fluorescence in materials at which the pulse trains are directed. The parameters of the laser pulse train are selected to increase fluorescence relative to a constant-amplitude laser pulse train. The amplitude-modulated laser pulse trains produced using the teachings of this invention can be used to enable detection of specific molecules in applications such as gene or protein sequencing.

In a draw tower for producing a length of optical fiber, a preform feed accepts a preform into the draw tower and a furnace downstream of the preform feed heats the preform. Fiber shaping hardware downstream of the thermal furnace is controlled by fiber shaping control electronics to produce along the fiber at least one low-absorption fiber section having a first cross-sectional geometry of the inner cladding layer corresponding to a first level of absorption of input pump light from the inner cladding layer to the core and at least one high-absorption fiber section having a second cross-sectional geometry of the inner cladding layer corresponding to a second level of absorption of input pump light from the inner cladding layer to the core that is greater than the first level of absorption. A tractor downstream of shaping hardware pulls the preform through the furnace and shaping hardware.

Herein is provided a fiber length including a doped fiber core extending over the fiber length. First and second cladding regions radially surround the core. At least one pump light input site is arranged to accept input pump light into the first cladding region. A low-absorption length over which the first cladding region has a first cross-sectional geometry produces a first level of absorption of input pump light from the first cladding region to the core, extending from a pump light input site for an extent over which the doped core can absorb at least about 10% of input pump light from the first cladding region. A high-absorption section over which the first cladding region has a second cross-sectional geometry produces a second level of absorption of input pump light from the first cladding region to the core, greater than the first level of absorption of input pump light.

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.