H-SMART Automated Harmonic Generator’s technical details

Specifications | Exit port configuration options | Advanced features | Description

Specifications ¹⁾

Model	H-SMART
Conversion efficiency 2)
Fundamental to second harmonic	> 50 %
Fundamental to third harmonic	> 30 %
Fundamental to fourth harmonic	> 15 %
Fundamental to fifth harmonic	> 6 %
Pulse to pulse energy stability @ 3)
526.5/532 nm	<2.5 % RMS
351/355 nm	<3.5 % RMS
263/266 nm	<4 % RMS
211/213 nm	<5 % RMS
Spectral purity for Port #1 4)	>99%
Typical pulse duration	10-20% shorter in each conversion stage
Typical beam diameter	10-30 % smaller than pump beam
Beam pointing stability	same as of pump beam
Dimensions
Harmonic generator (W×L×H)	160× 270× 141 mm3
Weight	<5 kg
Operating requirements
Ambient temperature	15 – 30 ºC
Relative humidity	10 – 80 % (non-condensing)
Powering	12 VDC 5)
Average power consumption	<20 W

Exit ports configuration options

H-SMART-	Port #1			Port #2	Port #3
	WL 7)	AT 8)	EM 9)	WL 7)	WL 7)
SH	532 nm	-AT2	-EM2	1064 nm 10)	N/A
SH/SP	532/1064 nm selectable	-AT	-EM/BB	N/A	N/A
SH-AT1	1064 nm	build-in	-EM1	532 nm 10)	N/A
SH-AT2	532 nm	build-in	-EM2	1064 nm 10)	N/A
TH	355 nm	-AT3	-EM3	532&1064 nm 11)	N/A
TH-2P	355 nm	-AT3	-EM3	532&1064 nm 11)	N/A
TH-AT1	355 nm	-AT3	-EM3	532 nm 10)	N/A
TH-3P	1064 nm	build-in	build-in	532 nm 10)	355 nm 10)
TH/SP	355/532/1064 nm selectable	build-in	-EM/BB	N/A	N/A
TH/OPO	355/1064 nm selectable	build-in	-EM/BB	532 nm 10)	N/A
FH	266 nm	-AT4	-EM4	532&1064 nm 11)	N/A
FH-1P	266 nm	-AT4	-EM4	N/A	N/A
FH-2P	266 nm	-AT4	-EM4	532&1064 nm 11)	N/A
FH-AT1	266 nm	-AT4	-EM4	532 nm10)	N/A
FH-3P	1064 nm	build-in	build-in	532 nm10)	266 nm 10)
FH/SP	266/532/1064 nm selectable	build-in	-EM/BB	N/A	N/A
SH/TH/FH-3P	355 nm	-AT3	-EM3	532&1064 nm 11)	266 nm 10)
SH/TH/FH-2P	266/355 nm selectable	N/A	-EM/BB	532&1064 nm 11)	N/A
SH/TH/FH-UN	266&355&532& 1064 nm	buil-in	N/A	N/A	N/A
FiH	213 nm 12)	-AT5	-EM5	N/A	N/A
FiH/FH	213/266 nm selectable 12)	N/A	-EM/BB	N/A	N/A

 

Figure 1. H-SMART harmonic generator port number assignment

Advances Features

• Single output port – motorized selection of required wavelength, emitted trough the same exit aperture.

• Self-tuning capability – automatic phase-matching optimization for maximum efficiency.

• Monitoring – real-time pulse energy tracking at fundamental or harmonic wavelengths.

• Bypass mode – allows the fundamental 1064 nm beam to pass through with minimal optical loss.

• Attenuation – adjust pulse energy without altering the pump laser output.

• Enhanced spectral purity – up to 99.9% purity of the selected harmonic wavelength.

H-SMART-	No. of exits	Self-tuning	Monitoring	Bypass	Attenuation	Enhanced spectral purity
SH	2	optional	optional	–	optional	–
SH/SP	1	√	√	√	optional	–
SH-AT1	2	optional	optional	√	√	–
SH-AT2	2	optional	optional	–	√	–
TH	2	optional	optional	–	optional	–
TH-2P	2	√	√	–	optional	–
TH-AT1	2	√	optional	–	√	–
TH-3P	3	√	optional	√	√	–
TH/SP	1	√	optional	–	√	–
TH/OPO	2	√	√	√	√	–
FH	2	optional	optional	–	optional	–
FH-1P	1	√	optional	–	optional	√
FH-2P	2	√	√	–	optional	–
FH-AT1	2	√	√	–	√	–
FH-3P	3	√	√	√	√	–
FH/SP	1	√	optional	–	√	√
SH/TH/FH-3P	3	√	√	–	optional	–
SH/TH/FH-2P	2	√	√	–	optional	–
SH/TH/FH-UN	1	–	–	–	√	–
FiH	1	√	optional	–	optional	√
FiH/FH	1	√	optional	–	–	√

1. Due to continuous improvements all specifications are subject to change. The parameters marked typical are not specifications. They are indications of typical performance and will vary with each unit we manufacture.
2. Conversion efficiency presented here is for Port #1. Conversion efficiency at Port #2 or Port #3 depends on unit configuration and typically are lower than presented here. Please inquire for details.
3. When unit is pumped by our Q2 or Q2HE series laser. Measured during 30 seconds operation after warm-up.
4. Spectral purity at Port #2 or Port #3 could not be specified for two-wavelength output configuration.
5. When supplied with Q2 or Q2HE laser, H-SMART is powered from laser controller.
6. See Figure 1 below for port number assignment.
7. Wavelength is shown for 1064 nm pump wavelength. For 1053 nm pump wavelength recalculate wavelengths accordingly.
8. Shows compatible attenuator model. This option is available only when H-SMART is supplied together with Q2 or Q2HE series laser.
9. Shows compatible pulse energy monitor model. This option is available only when H-SMART is supplied together with Q2 or Q2HE series laser.
10. Spectral purity is >98 %.
11. Both wavelengths exit Port #2, for separation external dichroic mirror is required.
12. Spectral purity for this model is >99.9%.

Description

The H-SMART Harmonic Generator is a fully automated, stand-alone module designed for Q2 and Q2HE diode-pumped lasers.
Mounted side-by-side with the laser on a common optical table or breadboard, the H-SMART provides a compact and robust solution for automated wavelength conversion up to the fifth harmonic.

Factory-configurable output ports enable generation of multiple harmonics, including:

• Second Harmonic Generation (532 nm)

• Third Harmonic Generation (355 nm)

• Fourth Harmonic Generation (266 nm)

• Fifth Harmonic Generation (213 nm)

Custom wavelength configurations are also available on request, making the H-SMART ideal for research and industrial applications requiring flexible multi-wavelength operation.

The microprocessor-controlled H-SMART automatically tunes and stabilizes nonlinear crystal temperatures for maximum pulse energy and stability.
When paired with QLI lasers, it can be remotely monitored and controlled directly from the laser control interface (PC connection required) or via the built-in Ethernet interface.

To ensure long lifetime of birefringent nonlinear crystals, the H-SMART maintains a stable elevated temperature, protecting sensitive components from humidity.
Even in demanding environments, the crystals can outlast the laser system itself when the module remains powered. If the system is not in use, it should be stored in a dry environment to preserve crystal integrity.

The H-SMART module combines precision, automation, and stability to deliver outstanding performance for multi-wavelength harmonic generation — from the Second Harmonic Generator to the Fifth Harmonic Generator. Its flexible architecture and digital control make it a perfect complement to QLI’s Q2 and Q2HE laser, ensuring reliable and repeatable harmonic conversion for scientific, spectroscopic, and micromachining applications.