Technology

Intra-cavity Impedance-Matched Amplification-Tuned Laser Technology (iMAT^®) is the revolutionary new DPSS laser platform from KLASTECH. Protected under a global patent this design underpins many of KLASTECH´s most revolutionary lasers.

This exciting new architecture delivers a step change in performance for continuous wave (CW) DPSS lasers. By employing a complex dual cavity design, the technology for the first time enables the fundamental wavelength generating cavity and the second harmonic conversion process to be impedance matched leading to:

• Significantly increased 2nd harmonic conversion efficiency
• Zero ‘green´ noise
• Inherently diffraction limited output
• Naturally frequency selective performance

The diagram above illustrates the underlying physics.

The fundamental 1064nm wavelength is generated in the Active Crystal (AC) end pumped by an 808nm pump diode as in a traditional architecture.

In the KLASTECH design however, this fundamental wavelength light circulates in the cavity created by mirrors R0 and R1 that contain AC, as well as in the cavity created by mirrors R1 and R2 that contain the nonlinear crystal, NC. These two cavities are coupled to each other via the intra-cavity coupler Rc. The reflectivity value of Rc is carefully chosen so that the input impedance of the second cavity (R1-R2) at the fundamental wavelength is equal to the output impedance of the first cavity (R0-R1) at the moment when the two cavities are tuned in resonance by the fine piezo-electric positioning of the mirror R2. As the result of this impedance-matching between the two cavities, for any 808nm pump input the extraction of the 1064nm power from AC is always at the maximum making the fundamental wavelength power circulating through NC within the second cavity significantly higher as compared with traditional architectures. Clearly this enables a significant increase in the production of 532nm light through the second harmonic generation process in NC.

KLASTECH'S laser technology delivers other advantages too:

• The de-coupling of the two cavities ensures immunity from ‘green´ noise
• A cold cavity design that inherently spatially filters the infra-red light circulating in the laser provides for diffraction limited output every time (M2 <1.05)
• The Fox-Smith interferometer arrangement is inherently frequency selective allowing KLASTECH lasers to produce line widths <1MHz leading to coherence lengths >100m
• Easier to manufacture thus delivering lower cost of production, since the high beam quality, frequency selectivity and higher 2nd harmonic conversion efficiency are inherent in the design

Independently recognized by Frost & Sullivan this award winning technology represents a 21st century revolution in DPSS laser design.

KLASTECH's approved patent

Intracavity Frequency Conversion Of Laser Radiation

# 1 442 507 B1 - Europe
# 4018629 - Japan
# 10-0630028 - South Korea
# 226455 - India
# ZL 02818340.1 - China
# US 7, 760, 774 B2

 

European Patent (88 Kb)

Technology Know How (126 Kb)

 

Frost & Sullivan Commends KLASTECH's Technology Innovation

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