Through heat dissipation, thermally conductive adhesives and potting compounds play a pivotal role in the protection of today’s electronic circuitry.  In tandem with the great growth of the technological sector comes the need for a new generation of innovative, highly advanced solutions capable of reliable performance in the ever increasing temperatures of electronic devices. Master Bond’s white paper examines the challenges design engineers face as chip makers up the ante on microprocessor power and density, and how thermally conductive adhesives and potting compounds can manage heat while solving other application issues.

Applications that must meet stringent outgassing requirements now have more adhesive options than ever. If you suspect outgassing could potentially pose a problem in your application, specifying adhesives that comply with the ASTM outgassing standard makes sense.
Engineers often want to know whether an adhesive is low outgassing or generic. And while there are cases when nothing but a low outgassing product will do, the truth is that many so-called generic adhesives inherently have low outgassing levels. What's more, most bonding, potting, encapsulation and sealing applications don't need to meet a defined outgassing specification. Here's a guide to understanding when low outgassing adhesives are the right choice.

In this work we report on high-power diode laser modules covering a wide spectral range from 410 nm to 2200 nm. Driven by improvements in the technology of diode laser bars with non-standard wavelengths, such systems are finding a growing number of applications. Fields of application that benefit from these developments are direct medical applications, printing industry, defense technology, polymer welding and pumping of solid-sate lasers.

By exploiting the giant electro-optic effect of potassium tantalate niobate (KTN)
crystal, we have developed a wide-angle fast optical beam scanner and a fast
varifocal lens. These devices are applicable not only to optical communications,
but also to various other fields that use optical beams, so we are seeking sales
scenarios for KTN devices.

Fast varifocal lenses that respond as fast as 1μs, which is 1000 times faster
A new spectrometer fabricated using a combination of a KTa1-xNbxO3 (KTN) optical
beam scanner and a wavelength dispersion element. This spectrometer can measure
a wide optical spectrum in microsecond-order time. A high-speed spectrometer is
now being developed to observe ultrafast luminous phenomena.

Fast varifocal lenses that respond as fast as 1μs, which is 1000 times faster
than the conventional commercial devices. The lens structure is quite simple: a
potassium tantalate niobate single-crystal (KTN) block with four electrodes on
it. We were able to obtain both fast responses and large focal shifts by using
this simple structure and the large electro-optic effect of KTN. These lenses are
expected to be applied to new technical fields such as laser manufacturing.

Northrop Grumman Cutting Edge Optronics has developed a new laser diode array package with minimal bar-to-bar spacing. These High Density Stack (HDS) packages allow for a power density increase on the order of ~ 2.5x when compared to industry-standard arrays.

This work contains an overview of the manufacturing process, as well as representative data for 5-, 10-, and 20-bar arrays. Near-field and power vs. current data is presented in each case. Power densities approaching 15 kW/cm2 are presented. In addition, power and wavelength are presented as a function of pulse width in order to determine the acceptable operational parameters for this type of array. In the low repetition rate Nd:YAG pumping regime, all devices are shown to operate with relatively low junction temperatures

                    
A new laser beam scanning phenomenon has been discovered in KTN crystal by NTT Photonics Laboratories and was named “space charge limited electro-optic effect”. This phenomenon is caused by electron injection into KTN crystal. Since the injected electrons exist as true charges in the crystal, they terminate the electric field originating from the anode, and the electric field becomes non-uniform between the electrodes. KTN crystal has an extremely large quadratic electro-optic effect. The electric field induces graduation of refractive index inside the crystal and the optical beam traveling through the crystal is continuously and cumulatively deflected.

The new optical beam scanning phenomenon was discovered using KTN crystal.
Theoretical and experimental investigation by NTT Photonics Laboratories has revealed Novel Optical Beam Scanning Phenomenon that the beam scanning phenomenon is based on a new concept; electron injection into KTN crystal. This is the first demonstration of a novel optical beam scanning phenomenon without moving parts. This phenomenon was named “space-chargecontrolled electro-optic effect” by NTT Photonics Laboratories.

Yttrium Aluminum Garnet (YAG) has emerged as the most widely produced laser gain
host and has enjoyed recent popularity as a substrate material for
optical components.