High Energy Lasers

Description

The GxJ series high energy single shot Nanosecond E-O Q-SWITCHED Nd:Glass lasers

The GxJ series comprises a family of 4 lasers each of which based on a Nd:YLF oscillator and one or more Nd:Phosphate Glass amplifiers. The lasers produce near-diffraction limited single-longitudinal mode (SLM) Gaussian radiation in the nanosecond regime from 1 to 16 J per pulse (fundamental harmonic). Design features include a highly stable EO or passively Q-switched, linear telescopic or ring-cavity oscillator, 2-pass amplification using high energy Brillouin phase conjugation (SBS) and optional frequency conversion to the second or third harmonics by DKDP. In addition to constituting highly versatile laboratory tools all GxJ lasers are rigorously designed to meet the high standards required for scientific interferometric purpose or holography applications, where smooth beam shape and long coherence length is of key importance.

APPLICATIONS

Holographic applications;
Interferometer applications;
Plasma research;
Seeding of amplification cascades;
Absorption spectroscopy of laser induced plasma;
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SYSTEM FEATURES

Coherence length exceeding of > 10m length;
Optimized laser characteristics for display and technical holography applications;
Remote control via wireless unit;
Low electrical consumption.
Laser energy meters are included in standard package
PC control via RS232 using advanced Geola software or LabView drivers (optional);
Lasers are CE marked according to IEC 60825-1:2001/EN 60825-1:2001.k.

Technical specifications

Model specifications

G1J

G2J

G5J

G8J

Output Wavelength, nm:

1053

526.5

351

1053

526.5

351

1053

526.5

351

1053

526.5

351

Output energy, Joules:

0.4

0.9

–

Pulse duration, ns:

–

Beam Diameter (1/e²), mm:

<10

<16

<18

Beam Divergence:

Near Diffraction limit

Coherence Length⁽¹⁾:

> 10 m

Pulse Energy Stability⁽²⁾:

5% at 526.5 nm

Beam Profile:

Near Gaussian in near field and Quasi-Gaussian in far field

Pulse contrast ratio at 1053nm:

>10⁵:1

Repetition rate – Pilot Mode:

0.5…2 Hz

Repetition rate – High Energy Mode:

1 pulse per 2 min

1 pulse per 3 min

Polarization:

Horizontal, > 98% @ 1053nm

Optical Pulse Jitter⁽³⁾:

< 2.5us for Passive Q-Switch and ~ 1 ns for E-O Q-Switch

Triggering:

External/Internal

Dimensions

Laser Head: (W x H x L), mm

1105 x 320 x 225

1000 x 468 x 225

Power & Cooling Cabinet:
(W x H x L), mm

50 x 880 x 600

550 x 1250 x 600

Umbilical Length, m:

~ 2.5

Environmental requirements

Cooling requirements: (Water flow for 20^oC water temperature)

< 10 liters/minute

Room temperature:

22-24^oC

Relative Humidity:(non-condensing)

< 75 %

Mains Voltage:

210…240 VAC, single phase 50/60 Hz

Power Consumption:

< 1 kW

< 2.5 kW

(Geola Digital reserves the right to change specification without notice)

⁽¹⁾ Coherence length at 526.5nm
⁽²⁾ Std.Dev. at High Energy Mode
⁽³⁾ Std.Dev. with respect to External sync pulse signal

OPTICAL SCHEMES AND CHARACTERISTICS

Typical temporal pulse shape G5J – 526.5 nm

G5J beam profile

The GxJ-TWIN series comprises a family of lasers which based on two mutually coherent and independently tunable outputs ports; basically consisting from a Nd:YLF oscillator, pre-amplifier and one pair or more Nd:Phosphate Glass amplifiers. The lasers produce near-diffraction limited single-longitudinal mode (SLM) super-Gaussian radiation in the nanosecond regime from 2 to 20 J per pulse (fundamental harmonic). Design features include a highly stable EO or passively Q-switched ring or linear cavity oscillator, 2-pass amplification using high energy Brillouin phase conjugation (SBS) and optional frequency conversion to the second or third harmonics by DKDP. All GxJ-TWIN lasers are rigorously designed to meet the high standards required particularly for scientific interferometric or holography application purposes, where double output mutually-coherent smooth beam shape and long coherence length is of key importance.