G&H

G&H’s acousto-optic deflectors provide unmatched precision and speed for high-speed laser beam scanning, with operating rates exceeding 250 MHz. Designed for applications such as material processing and digital imaging, they resolve hundreds to thousands of spots within microseconds. Offering broad wavelength coverage from 266 nm to 10.6 µm and scan angles ranging from ~5 mrad to over 60 mrad, they ensure flexibility for diverse laser systems. Uniform diffraction efficiency across the full scan angle guarantees consistent power throughput, essential for high-precision applications. With active apertures up to 15 mm and high-performance AO materials including TeO₂, crystal quartz, germanium, and sapphire, they support a wide range of configurations. Advanced 2D UV beam scanning is possible by cascading two UV deflectors with synchronized RF control. Available in standard models from 266 nm to 1500 nm, G&H also offers custom solutions, including multi-channel configurations for high-speed, high-volume OEM applications.

Transmission through an acousto-optic (AO) device causes the input light to experience a frequency shift equal to the RF drive frequency. Our acousto-optic frequency shifters (AOFS) are optimized for the needs of applications like interferometry, with the ability to achieve high extinction ratio between modes.

We offer standard products with frequency shifts of over 300 MHz and integrated low-power AOFS modules in which the RF driver has been built into the housing. Our team can also customize frequency shifters for specific application, including frequency shifts up to 600 MHz.

Our acousto-optic modulators are optimized for low scatter and high laser damage threshold. Rise time, modulation rate, beam diameter, and power handling needs of the application need to be understood in order to identify the best acousto-optic modulator and RF driver solution.

We also offer fiber-coupled acousto-optic modulators.

G&H offers low insertion loss, highly efficient acousto-optic Q-switches capable of handling very high peak power, and will draw on our 35 years of experience to match the cavity length, repetition rate, wavelength, beam diameter, polarization state and output power of a laser to the best acousto-optic Q-switch solution.

G&H offers an extensive line of AOTFs for wavelength regions from the UV through mid-IR, with resolution bandwidths of less than 1 nm. We also offer options such as large-aperture imaging filtering and sideband suppression. Fiber-coupled AOTF devices are available upon request.

G&H offers a wide variety of stable high-frequency RF drivers with analog and digital modulation capability, optimized by application. Additional application-specific features may include first pulse suppression, synchronization, pulse shaping, or multi-channel operation. Explore our new line of flexible Dual Drivers, or contact us to discuss a custom OEM design.

The G&H electro-optic Q-switch employs the highest optical quality lithium niobate available. The electro-optic effect of lithium niobate makes it extremely useful for Pockels cell Q-switching of several laser types including Nd:YAG, Nd:YALO, Nd:YLF and Er:YLF. Lithium niobate Q-switches are used in both military and commercial applications, including target designating, range finding, and ophthalmic surgery. Our crystals offer low loss, high contrast ratio, and low wavefront distortion, and are qualified for use at 300 MW/cm². The temperature-stable (TS and XTS) versions of our electro-optic LN Q-switches allow operation over a wide range of temperatures while maintaining excellent contrast ratio.

The G&H line of HI REL fused fiber optic components are available in PM and SM form. They are deployed in environments such as undersea and space where the costs of component replacement are prohibitive and reliability is of premier concern.

G&H is established as a preferred supplier of these components to most major undersea telecommunications equipment manufacturers. Our HI REL capability is built upon the foundation of an extended history of also manufacturing very reliable components for land-based (or terrestrial) systems in volume.

G&H offers a range of multimode combiners for pumping high power fiber lasers. They are based on precise fusion of multimode fibers techniques. For pumping of complex fiber amplifier designs, we have developed a signal feedthrough fiber at the center of the multimode fiber bundle, which is both single mode and polarization maintaining. We manufacture N × 1 multimode combiners as well as N + 1 × 1 combiners with a signal feedthrough fiber. Standard components are 3 × 1, 7 × 1, 2 + 1 × 1 and 6 + 1 × 1. All variants are available with custom pump, signal and output fibers.

G&H is an established manufacturer of high quality optical components and optical sub-systems for the biomedical imaging market with manufacturing bases in the UK and the USA.

Our extremely wideband optical coupler offers uniform performance over a 140 nm wavelength range for spectral domain OCT, and can be integrated into modules like our OCT optical delay line. We also offer a compact OCT optical spectrometer with high resolution and image capture rate, completing a line of modular OCT components that may be purchased for research and OEM use, or integrated by our engineering team into a customized, complete system.

G&H designs and manufactures custom modules – fiber assemblies of passive and/or active optical components integrated to provide higher functionality in a compact footprint. Customers sourcing fiber optic assemblies stay focused on their core competence while reducing time to market and development costs. Our in-depth understanding of optical component performance, combined with the use of low loss G&H products, ensures optimized designs. Advanced assembly techniques such as ribbon splicing and fiber recoating are used to provide robustness, reduce form factors, and minimize manufacturing costs.

At G&H, we take a custom module designs from specification all the way through to a manufactured product. We are expert in mechanical design for optics, fiber optics, and fiber assemblies. Our fiber assemblies include pigtailed lasers, spectrometers, optical delay lines, telescopes, and fiber collimators. The most complex assemblies can include bulk optics, fiber optics, motion control, and electronics.

G&H's Periodically-Poled Lithium Niobate nonlinear crystals allow for efficient conversion of wavelengths in the range from visible to 5 µm. The poling pattern is lithographically defined and highly customizable allowing crystals to be used in a wide range of applications that require wavelength conversion.

Phase-matching over very long propagation lengths at infrared wavelengths is possible with our congruently grown PPLN manufactured from highly uniform Z-axis wafers.

Get in touch with us to request a quote or talk to us about a solution dedicated to your OEM application.

G&H are a leading crystal grower with decades of electro-optic device design experience. We manufacture a comprehensive range of Pockels cells for applications in wavelengths from the UV to the IR. Factors such as average power, repetition rate and the design configuration determine the recommended type of device.

Utilizing proprietary crystal growth, fabrication, and polishing techniques, we manufacture both longitudinal and transverse electrode configuration Pockels cells in beta barium oxide (BBO), cadmium telluride (CdTe), potassium dihydrogen phosphate (KDP) and potassium dideuterium phosphate (KD*P).

Our acousto-optic Q-switches are rugged, reliable, and long-lasting, backed by millions of hours of service in the field.

We offer low insertion loss, highly efficient acousto-optic Q-switches capable of handling very high peak power, and will draw on our 35 years of experience to match the cavity length, repetition rate, wavelength, beam diameter, polarization state and output power of a laser to the best acousto-optic Q-switch solution.

G&H offers a wide variety of stable high frequency drivers with analog and digital modulation capability, optimized by application. Explore our new line of flexible Dual Drivers, or contact us to discuss a custom OEM design.

As our AO product lines expand, we are creating more flexible, adaptive RF drivers with dual analog/digital operation and configurable firmware to accommodate functionality like triggering and temperature control without the need for new hardware. Our OEM designs, in contrast, are optimized to each customer’s application, maximizing performance in the required form factor.

Our expertise in the design and development of high-reliability space photonics is leveraged to create a portfolio of space compatible products and solutions exploiting our vertical integration capabilities. We realize key building blocks of next-generation laser communication terminals and sensing equipment by integrating components into high-value systems. Within the frameworks of commercial and R&D contracts, we advance the state-of-the-art fiber optic modules.

We offer the complete range of related services, including but not limited to:

• Optical amplifier development
• Low SWAP-C transmitter and receiver amplifiers development and manufacture
• Custom assembly
• Photonic packaging for harsh environments
• Space qualified components for amplifiers, transmitters, receivers, beam combiners (WDMs), and fused couplers