Lastek: Photonics Technology Solutions

Ekspla's  APL210x series amplifiers are designed to produce up to 1000 mJ picosecond pulses. High pulse energy, excellent pulse-to-pulse energy stability, superior beam quality makes APL210x series picosecond amplifiers well suited for applications like OPCPA pumping, non-linear optics and others.

REGENERATIVE AMPLIFIER / POWER AMPLIFIER DESIGN

APL210x series amplifiers are designed to be seeded by external seeding source. Diode pumped regenerative amplifier ensures amplification of seed signal to stable mJ level pulse for amplification in linear amplifiers.  Advanced beam shaping ensures smooth, without hot spots beam spatial profile at the laser output. Low light depolarization level allows high efficiency  generation of up to 4th harmonics with build-in harmonics generators. Read more.

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The Ekspla Atlantic HR diode pumped picosecond laser introduces a high repetition rate solution for material processing and other industrial applications.
Diode pumped solid state laser technology combined with EKSPLA‘s 20 years of experience in picosecond lasers has enabled the design and manufacture of a reliable cost effective tool. A rugged design ensures stable and reliable operation in diverse ambient conditions. Short pulse duration (< 8 ps) and good beam quality (M2 < 1.3) make this laser an excellent choice for many industrial as well as R&D applications.
A high repetition rate allows for fast processes with multiple meters per second scanning speed. Read more. 

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Ekspla's  Atlantic series lasers have been designed as a versatile tool for a variety of industrial material processing applications. They are compact, OEM rugged, with up to 60 W output power at 1064 nm. Featuring short pulse duration Atlantic series lasers offers minimized thermal damage to the material, what is becoming more and more important in wide range of industries: photovoltaics, electronics, biomedicine, automotive.

Innovative design, employing fiber based oscillator ensured excellent output beam parameters: M2 < 1.3 with pulse energy fluctuations < 1 %. All optical components are placed into sealed monolithic block thus ensuring reliable 24/7 operation.

High, up to 1 MHz repetition rate, combined with low maintenance requirements establishes this laser as good choice for industrial, high throughput material processing systems, requiring speed and precision. Optical components are installed in a robust, precisely machined monolithic aluminum block, which could be used as a separate module for customized solutions. Read more. 

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Ekspla's  Atlantic 6 is designed for industrial micromachining applications as a reliable, compact and cost effective solution. Hybrid fiber and DPSS technologies implemented in this model make it also very energetically efficient, which enables air cooling solution for laser head. No water is used inside laser, which means you should not worry about unexpected leakage, regular water replacement or possible chiller failure. Laser head generates only around 150 W of heat, so it required quite simple heat management solutions for system integrators. Laser do not require a chiller or big heat exchanger, so all control and power supply electronics is fit into standard 3U 19-inch rack.

Hybrid technology enables new pulse control features, which are not present in earlier Atlantic series lasers. Atlantic 6 can provide burst of pulses spaced only 25 ns in time, so called seeder burst mode. It is very useful in material processing applications, because in some cases it allows to increase process efficiency or at least provides additional variable parameter for process optimization. Atlantic 6 has broad range of accessible pulse repetition ranges, from single pulse to 1 MHz. Read more.

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Ekspla's  LightWire FPS series fiber lasers are dedicated for seeding solid state Nd:YAG amplifiers. Compact, cost efficient FPS series models deliver sub‑10 ps pulses at 1064 nm wavelength with the average output power up to 200 mW and pulse energy up to 50 nJ.

They feature narrow close to bandwidth limited spectrum and low pulse amplitude noise. Wavelength tunability ensures that seed pulses are always spectrally overlapped with the amplification spectrum of your amplifier. Read more. 

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Ekspla'sLightWire FP200 laser is dedicated for researchers and OEM integrators, who require small, convenient and maintenance free source with transform limited picosecond pulses.

Widely tunable pulse repetition rate 20 kHz – 40 MHz makes it an excellent choice for non-linear microscopy, time-resolved spectroscopy, terahertz spectroscopy, ultrafast metrology applications. FP200 model is available with second harmonic option (532 nm). Read more. 

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Ekspla's  SL212 laser is excellent solution for applications, where high energy picosecond pulses are needed. In contrary to conventional mode-locked lasers the SL212 series lasers use different method of generating short pulses based on backward-stimulated Brillouin scattering (SBS). Diode pumped passive Q-switched single longitudinal mode (SLM) nanosecond generator is the heart of the system. It provides nanosecond optical pulse that is later compressed during SBS in a special cell.

Pulse compressor consists of optical guiding system and SBS-cell. SBS cell is designed for safe and longlife maintenance free operation. A linearly polarized light pulse from master oscillator passes through QWP and is focused into SBS-cell by lens. Focusing is arranged in the way to compress the pulse via SBS process. The backscattered Stokes pulse, as its phase is reversed, strictly repeats the path of pump pulse in the opposite direction and with a reversal divergence. The compressed pulse is guided into the amplification stage using polarizer and mirror.

After SBS compression, pulse is directed to multi-pass flashlamp pumped power amplifier system, providing high-energy pulses. SL212 model lasers use multi-pass amplifier system which is based on laser chamber containing Nd:YAG rod pumped by two flash lamps. For smooth obtaining output beam profile pre-amplifier and double-pass amplifier layout is used in SL212 series lasers. Power amplifier includes optical components arranging passes through the active element. Aperture is employed to prevent the returning depolarized radiation from getting back into the amplifier.

Thermocontrolled harmonics’ generators, based on angle-tuned non-linear crystals and harmonic separation optics are available as standard options. Fundamental and second harmonics are separated and has a single output port. Harmonics’ crystals mounted in temperature‑controlled heaters. Pulse compression during SBS, is a simple and cost effective way for generating high power picosecond pulses. In addition to it, SBS compression allows generation of pulses with exceptional pulse duration range: from 150 ps up to 1000 ps. A power supply and water/water type cooling units, placed in standard 19” rack, requires a little space under the user’s optical table. Read more. 

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Ekspla's PL2210 series diode-pumped, air-cooled, mode-locked Nd:YAG lasers provide picosecond pulses at a kilohertz pulse repetition rate.
Short pulse duration, excellent pulse-to-pulse stability, superior beam quality makes PL2210 series diode pumped picosecond lasers well suited for many applications, including material processing, time-resolved spectroscopy, optical parametric generator pumping, and other tasks.

Flexible Design

PL2210 series lasers offer a number of optional items that extend the capabilities of the laser. A pulse picker option allows control of the pulse repetition rate of the laser and operation in single-shot mode. The repetition rate and timing of pulses can be locked to an external RF source (with –PLL option) or other ultrafast laser system (with –FS option). The laser provides a triggering pulse for synchronization of the customer‘s equipment. A low jitter SYNC OUT pulse has a lead up to 500 ns that can be adjusted in ~0.25 ns steps from a PC. Up to 400 μs lead of triggering pulse is available as a PRETRIG option that is designed to provide precise, very low jitter trigger pulses for a streak camera. Custom-built models with higher pulse energy are available on request.

Built-in Harmonic Generation

Automated angle-tuned non-linear crystals mounted in temperature stabilized heaters are used for second, third and fourth high spectral purity harmonic generation.

Simple and Convenient Laser Control

The laser can be controlled from a user-friendly remote control pad or USB interface. The remote pad allows easy control of all parameters and features. Alternatively, the laser can be controlled from a computer with supplied software for a Windows™ operating system. LabVIEW™ drivers are supplied as well. Read More.

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APL2200 series amplifiers are designed to produce up to 150 mJ picosecond pulses at kilohertz pulse repetition rate. Short pulse duration, excellent pulse-to-pulse stability, superior beam quality makes APL2200 series diode pumped picosecond amplifiers well suited for applications like OPCPA pumping, non-linear optics and others.

REGENERATIVE AMPLIFIER / POWER AMPLIFIER DESIGN

APL2200 series amplifiers  consist of regenerative amplifier and power amplifiers. System could be seeded by built-in picosecond oscillator or other ultrafast laser system.  Pulses from regenerative amplifier are spatially shaped and amplified in double-pass amplifiers with thermally induced birefringence compensation. Advanced optical design ensures smooth, without hot spots beam spatial profile at the laser output. Low light depolarization level allows high efficiency generation of up to 4th harmonics with build-in harmonics generators. Repetition rate and timing of the pulses can be locked to the external RF source (with –PLL option) or other ultrafast laser system (with –FS option). Read more. 

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Ekspla's SL300 series lasers are an excellent solution for applications that require high energy picosecond pulses. Pulse compression during backward‑stimulated Brillouin scattering (SBS), used in EKSPLA SL300 series lasers, is a simple and cost‑efficient way to generate picosecond pulses, with the unique capability of producing pulses with tunable duration.

An electro-optically Q-switched Single Longitudinal Mode (SLM) nanosecond generator is the heart of the system. Instead of external narrow linewidth diode lasers, the selective properties of Fabry-Perrot etalon, and a laser cavity are used to produce SLM pulses with a smooth temporal envelope. In scientific literature this method of generating SLM pulses is known as a selfseeding technique.

Pulse compression is done in a SBS‑cell. Depending on the geometry of interaction, a pulse with duration in the 170 – 1500 ps range can be produced. Pulse duration can be tuned in discrete steps when a variable pulse duration option (-VPx) is installed. After SBS compression, the pulse is directed to a multi-pass power amplifier system for amplification to up to 500 mJ energy.

Temperature controlled harmonics generators, based on angle-tuned KD*P and KDP crystals and harmonic separation optics, are available as standard options. Each wavelength has a separate output port.

A power supply and cooling units are placed in a standard 19” rack that requires little space under an optical table. The very low jitter of the optical pulse relative to the Q-switch triggering pulse ensures reliable synchronization of the laser with external equipment. For customer convenience the laser can be controlled from a user-friendly remote control pad or RS232 interface. The remote pad allows easy control of all laser parameters and features a backlit display that is easy to read even when wearing laser safety eyewear. Alternatively, the laser can be controlled from a personal computer with supplied software for a Windows™ operating system. LabView™ drivers are supplied as well. Read more. 

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