External Cavity Laser Kit


Alpes Lasers’ line of External Cavity Laser Kits (ECLK) is designed for single-mode operation with wide spectral tunability. The ECLK consists of a quantum cascade laser (QCL) gain chip, a grating-tuned extended optical cavity in Littrow configuration, laser drive electronics, an Alpes Lasers TC-3 temperature controller, and a graphical user interface software. 


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The ECLK is compatible with the Alpes Lasers line of Broad Gain QCLs which tune over up to 25% of their center wavelength. The gain medium is prepared in form of antireflection (AR) coated Fabry-Perot cavity, soldered to an aluminium nitride submount and to a copper carrier. The temperature is actively regulated by a heatsink assembly that includes a thermoelectric element and water cooling for improved heat dissipation.

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nullThe graph on the left showcases the range covered by different chips that can be used in the ECLK system in dotted lines and the direct emission range in full lines. The bottom row shows a series of chips that can be used to cover the entire range, and over these other chips may be used to reach a particular range better. 



The following table lists the specific performance of the Broad Gain lasers shown in pulsed mode:

Laser
Tuning from
Tuning 
to
Avg. Power at optimum frequency
Typical tuning curve
BG-4.4-5.2
<1930 cm-1
>2230 cm-1
>2 mW null
BG-5.1-6.1
<1660 cm-1
>1930 cm-1
>15 mW null
BG-5.5-6.2
<1635 cm-1
>1780 cm-1
>15mWnull
BG-6.1-7.4
<1375 cm-1
>1615 cm-1
>1mWnull
BG-6.2-7.4 
<1380 cm-1
>1595 cm-1
>6mW
null
BG-7-8.8
<1160 cm-1
>1395 cm-1
>6mWnull
BG-7.4-9.7
<1060 cm-1
>1320 cm-1
>12mWnull
BG-7.4-10.3
<1010 cm-1
>1330 cm-1
>8mW null
BG-9.6-12.5
<830 cm-1
>1015 cm-1
>4mW null
BG-9.7-13.1
<795 cm-1
>1000 cm-1
>1mW 
null
BG-10.8-13.7
<760 cm-1
>900 cm-1
>1mW null

Click on the pictures for larger version


Furthermore, standard Fabry-Perot lasers with a narrower gain can also be compatible with the ECLK. Some of these lasers can also be available in CW mode while the broad gain lasers are only available in pulsed mode. You can see here a small subset of the performances available. For performances at other wavelengths, write to us to request testing!



Laser
Tuning from
Tuning 
to
Avg. Power at optimum frequency
Typical tuning curve
P-FP-4.5
<2145 cm-1
>2280 cm-1
>15 mW
null
CW-FP-4.5
<2160 cm-1
>2210 cm-1
>75 mW
null
CW-FP-6.0
<1640 cm-1
>1670 cm-1
>50 mW
null
P-FP-6.3
<1545 cm-1
>1645 cm-1
>10 mW
null
CW-FP-6.3
<1545 cm-1
>1600 cm-1
>50 mW
null
P-FP-7.4
<1320 cm-1
>1410 cm-1
>8 mW
null
CW-FP-7.4
<1320 cm-1
>1380 cm-1
>75 mW
null
P-FP-9.1
<1085 cm-1
>1125 cm-1
>5 mW null
CW-FP-9.1
<1085 cm-1
>1105 cm-1
>7mW
null
Click on the pictures for larger version





The laser is driven by an integrated Alpes Lasers S-2 pulsed driver. The graphical user interface allows for automatic wavelength tuning. The kit is delivered pre-aligned and ready to use. Additional gain chips with different wavelength coverage and/or output power can be purchased from Alpes Lasers and installed in the instrument by the user. In the case of purchasing a gain medium only, initial alignment and calibration steps are necessary; these steps are summarized in the ECLK User Manual. Characterization data is supplied with every kit and gain medium. Some typical available performances are shown in the table above.

To order your own External Cavity Laser Kit do not hesitate to  write to us

You can also buy it now directly on the Alpes Lasers Web Storenull