Ekspla SL230 Series SBS Compressed Picosecond Nd:YAG Lasers

SL230 series SBS compressed NdYAG laser 1

Ekspla's  SL 230 series lasers are excellent solution for applications, where high energy picosecond pulses are needed. Not like conventional mode-locked lasers that typically uses saturable nonlinear absorption or Kerr lensing to produce ultrafast pulses, the SL230 series lasers employ backwardstimulated Brillouin scattering (SBS) in liquid for the same purpose.

Innovative Design

Diode pumped electro-optically 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.

Q-switched master oscillator allows precise external triggering with jitter of less than 0.2 ns rms while modelocked lasers typically have jitters of at least of tens of nanoseconds or even worse. Precise sync pulses from internal delay generator are also available with less than 200 ps rms jitter in respect to optical pulse.

Pulse compression is done in SBS‑cell. The geometry of interaction is designed to produce shortest and most stable pulses with 100 ps duration. After SBS compression, pulse is directed to multi-pass flashlamp pumped power amplifier for amplification to up to 250 mJ pulse energy.

Some versions, like SL230 and SL231 are available with diode pumped power amplifier. Thermocontrolled 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.

Build in energy monitors continuously monitors output pulse energy. Data from the energy monitor can be seen on the remote keypad or on PC screen. Power supply and cooling units are mounted into standard 19” rack.

Simple and Convenient Laser Control

Laser is controlled by PC via USB port with application for Windows™ operating system. In addition, major settings of laser can be controlled through user‑friendly remote control pad. The remote pad features a backlit display that is easy to read even while wearing laser safety eyewear. Read more. 

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Ekspla PL3140 Series Picosecond Nd:YLF Lasers

PL3140 series picosecond mode locked NdYLF laser 1

Ekspla Nd:YLF mode-locked PL3143 series picosecond lasers produces high energy pulses with as short as 10 ps pulse duration.

Rugged and Reliable Design

Diode pumped mode-locked quasi‑CW master oscillator produces the train of the pulses that is guided to the regenerative amplifier for further amplification. The single pulse is cavity‑dumped from regenerative amplifier and then amplified by linear amplifiers to up to 80 mJ pulse energy. The output pulse energy can be adjusted in approximately 1 % steps from 1 mJ to nominal output, at the same time pulse-to-pulse energy stability remains less than 1.5 % rms at 1053 nm.

Angle-tuned KD*P and KDP crystals mounted in thermostabilised ovens are used for second, third and fourth harmonic generation. Harmonics separators ensure high spectral purity of each harmonic directed to different output port. Build in energy monitors continuously monitors output pulse energy. Data from the energy monitor can be seen on the remote keypad or on PC monitor.

The laser provides triggering pulse for synchronization of customer‘s equipment with lead up to 500 ns. The lead of triggering pulse can be adjusted in ~0.25 ns steps from control pad or PC. PRETRIG option is offered for streak camera triggering  and can provide pulse with up to 1000 μs lead that can be adjusted from PC with approx. 33 ns step.

Simple and Convenient Laser Control

For customer convenience the laser can be controlled via user-friendly remote control pad. The remote pad allows easy control of all the parameters and features a backlit display that is easy to read even when wearing laser safety eyewear. Alternatively, the laser can be controlled from personal computer via USB port using supplied software for Windows™ operating system. LabView™ drivers are supplied as well. Read more. 

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Ekspla PL2250 Series Flashlamp Pumped Picosecond Nd:YAG Lasers

PL2250 series flash lamp pumped picosecond NdYAG laser

Ekspla's PL2250 series lasers set a new standard in high pulse energy picosecond lasers. Their innovative and cost-effective design improves laser reliability and reduces running and maintenance costs.

Innovative Design

The heart of the system is a diode pumped solid state (DPSS) master oscillator placed in a hermetically sealed monolithic block. The flashlamp pumped regenerative amplifier is replaced by an innovative diode pumped regenerative amplifier. Diode pumping results in negligible thermal lensing, which allows operation of the regenerative amplifier at variable repetition rates, as well as improved long-term stability and maintenance-free operation.

The optimized multiple-pass power amplifier is flashlamp pumped and is optimized for efficient amplification of pulse while maintaining a near Gaussian beam profile and low wavefront distortion. The output pulse energy can be adjusted in approximately 1% steps, at the same time as pulse-to-pulse energy stability remains less than 0.8% rms at 1064 nm. Angle‑tuned KD*P and KDP crystals mounted in thermostabilised ovens are used for second, third and fourth harmonic generation. Harmonics separators ensure the high spectral purity of each harmonic directed to different output ports. Read more.

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Ekspla PL2230 series high energy full DPSS mode-locked Nd:YAG lasers

PL2230 series Diode Pumped High Energy Picosecond NdYAG Lasers

Ekspla is proud to introduce the PL2230 Series, the first commercial fully diode pumped high pulse energy mode-locked laser, producing 28 ps pulses with up to 35 mJ (50 mJ preliminary) at 50 Hz pulse repetition rate.

Innovative Design

The heart of the system is a diode pumped solid state (DPSS) master oscillator placed in a sealed monolithic block, producing high repetition rate pulse trains (88 MHz) with a low single pulse energy of several nJ. Diode pumped amplifiers are used for amplification of the pulse to 35 mJ (140 mJ preliminary) output. The high‑gain regenerative amplifier has an amplification factor in the proximity of 106. After the regenerative amplifier, the pulse is directed to a multipass power amplifier that is optimized for efficient stored energy extraction from the Nd:YAG rod, while maintaining a near Gaussian beam profile and low wavefront distortion. The output pulse energy can be adjusted in approximately 1% steps, while pulse‑to-pulse energy stability remains at less than 0.5% rms at 1064 nm.  Read more

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Ekspla PGx11 Transform Limited Broadly Tunable Picosecond OPA

PGX11 series picosecond narrow linewidth OPG

Ekspla's PGx11 series optical parametric devices employ advanced design concepts in order to produce broadly tunable picosecond pulses with nearly Fourier-transform limited linewidth and low divergence. High brightness output beam makes the PGx11 series units an excellent choice for advanced spectroscopy applications.

Optical layout of PGx11 units consists of Synchronously pumped Optical Parametric Oscillator (SOPO) and Optical Parametric Amplifier (OPA). SOPO is pumped by a train of pulses at approx. 87 MHz pulse repetition rate. The output from SOPO consists of a train of pulses with excellent spatial and spectral characteristics, determined by the SOPO cavity parameters.

OPA is pumped by a single pulse temporally overlapped with SOPO output. After amplification at SOPO resonating wavelength, the PGx11 output represents a high intensity single pulse on top of a low-intensity train, while in all other spectral ranges (idler for PG411 and PG711, signal for PG511, also DFG stages) only a single high intensity pulse is present.

Microprocessor based control system provides automatic positioning of relevant components, allowing hands free operation. Nonlinear crystals, diffraction grating and filters are rotated by ultra-precise stepper motors in microstepping mode, with excellent reproducibility.

Precise nonlinear crystal temperature stabilization ensures long-term stability of generated wavelength and output power.

For customer convenience the system can be controlled using a user-friendly remote control pad or through USB interface (RS232 is optional) from a personal computer (PC) using supplied LabView™ drivers.

Available standard models are summarized in a Specifications table below. Please inquire for custom-built versions. Read more. 

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Ekspla PGx03 Picosecond kHz Repetition Rate Broadly Tunable OPA

PGX03 series kHz repetition rate picosecond OPG

Ekspla's PGx03 series Optical Parametric Generators (OPG) are designed to be pumped by 1 kHz mode-locked lasers with 1 W average power. An excellent choice is the PL2210A series mode‑locked picosecond laser from EKSPLA.

The optical design is optimized to produce low divergence beams with moderate linewidth (typically 12 cm⁻¹) at approximately 20 ps pulse duration. Due to the unique broad tunability range from 210 to 16000 nm these devices are an excellent choice for many spectroscopic applications.

Upon request the optical layout can be easily modified for pumping by other mode-locked lasers with high pulse energy or longer pulse duration.

Microprocessor based control system provides automatic positioning of relevant components for hands free operation. Nonlinear crystals, diffraction grating and filters are rotated by ultra-precise stepper motors in the microstepping mode, with excellent reproducibility.

Precise nonlinear crystal temperature stabilization ensures long-term stability of generated wavelength and output power.

For customer convenience the system can be controlled using a user-friendly remote control pad or through USB interface (RS232 is optional) from a personal computer (PC) using supplied LabVIEW™ drivers.

Available standard models are summarized in a Specifications table below. Please inquire for custom-built versions. Read more. 

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Ekspla PGx01 series: High Energy Broadly Tunable Picosecond OPA

PGx01 series picosecond high peak power OPG

Travelling Wave Optical Parametric Generators (TWOPG) are an excellent choice for researchers who need an ultra‑fast tunable coherent light source from UV to mid IR.

The purpose of the OPG module is to generate parametric superfluores-cence (PS). Spectral properties of the PS are determined by the properties of a nonlinear crystal and usually vary with the generated wavelength.

In order to produce narrowband radiation, the output from OPG is narrowed by LNS down to 6 cm⁻¹ and then used to seed OPA.

Output wavelength tuning is achieved by changing the angle of the nonlinear crystal(s) and grating. To ensure exceptional wavelength reproducibility, computerized control unit driven precise stepper motors rotate the nonlinear crystals and diffraction grating. Nonlinear crystal temperature stabilization ensures long‑term stability of the output radiation wavelength.

In order to protect nonlinear crystals from damage, the pump pulse energy is monitored by built-in photodetectors, and the control unit produces an alert signal when pump pulse energy exceeds the preset value.

For customer convenience the system can be controlled through its USB type PC interface (RS232 is optional) with LabView™ drivers or a user-friendly remote control pad. Both options allow easy control of system settings. Read more.

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Ekspla PT200 Series Single Housing NIR-IR Range Tunable Picosecond Laser

PT200 series picosecond tunable lasers

Ekspla's PT200 series laser systems integrate a picosecond optical parametric oscillator and DPSS pump laser into a single compact housing. Mounting the components into one frame provides a cost-effective and robust solution with improved long-term stability and reduced maintenance costs.

The MHz pulse repetition rate enables the photon-counting detection method in numerous non‑linear spectroscopy and microscopy applications.

PT257 and PT259 are targeted for CARS and two photon fluorescence applications. The tuning range of PT257 and PT259 supports Raman shift measurements in the 1000 – 4000 cm⁻¹ range. An optional second harmonic generator extends the PT259 tuning range to UV, enabling time‑resolved laser-induced fluorescence measurements. The PT277 model produces approximately 0.5 W power in mid‑IR range from 2500 to 3400 nm with nearly Fourier transform limited linewidth. Applications include infrared spectroscopy and vibrational spectroscopy on surfaces.

All models produce nearly diffraction limited divergence beams, with M² measured as <1.3 over the tuning range.

The microprocessor-controlled wavelength tuning is fully automatic. The wavelength controlling elements are mounted on precise micro‑stepping motors. The temperature of the non‑linear crystal is controlled by a precise thermocontroller with a bidirectional Peltier element, resulting in the fast tuning of crystal temperature. The lasers may be controlled from a remote keypad or via USB (RS232 is optional) interface from a personal computer using LabView™ drivers. Read more

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