External Cavity Development 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.

The following Broad Gain lasers are compatible with the ECLK and will allow a tuning range as shown in the following table:




Laser
Tuning from
Tuning 
to
Avg. Power at optimum frequency
Typical tuning curve
BG-4.3-5
<1970 cm-1
>2270 cm-1
>2 mW null
BG-5-6
<1655 cm-1
>1860 cm-1
>10 mW null
BG-6-7
<1380 cm-1
>1540 cm-1
>1mWnull
BG-7-8 (currently out of stock)
<1160 cm-1
>1420 cm-1
>2mW
null
BG-7.7-10.2
<1030 cm-1
>1300 cm-2
>12mWnull
BG-11-14
<800 cm-1
>885 cm-2
>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. 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
<2141 cm-1
>2270 cm-1
>15 mW
null
CW-FP-4.5
<2150 cm-1
>2220 cm-1
>75 mW
null
P-FP-6
<1610 cm-1
>1650 cm-1
>8 mW
null
P-FP-9
<1069 cm-1
>1141 cm-1
>5 mW null
CW-FP-9
<1070 cm-1
>1120 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!