ASB-W-020 20W Tungsten-Halogen Fiber Light Source 

● Offers excellent color temperature stability

● Provides illumination for applications through optical fiber

● Focus adjustable light source SMA and fiber bundle adaptor

● Features built in current regulation



Optimum Illumination for Your Fiber Optic Needs


The ASB-W-020 is a complete light source assembly with a tungsten-halogen lamp that emits in the 300 to 2500 nanometer (nm) wavelength region. It has been designed to transfer the maximum possible illumination to a variety of fibers.

20W TH.jpg

The tungsten-halogen lamp of the ASB-W-020 is a near blackbody source of light with a built-in fused silica lens that focuses the light to the fiber. Figure 1 shows blackbody spectral distributions at various color temperatures in Kelvin (K). The ASB-W-020 spectral distributions resemble those of Figure 1 out to about 2500nm, beyond which the transmission of the fused silica lens limits the output.
In addition to the 20 Watt tungsten-halogen lamp (SP # ASB-W-020B), the ASB-W-020 features a lamp housing and a current regulator to assure a stable output. The housing contains an adjustable lamp mount. A variety of flanges allow the mounting of different fiber terminations, from a single fiber to bundles.
The 20 Watt tungsten-halogen lamp used in the ASB-W-020 has a nominal color temperature of 3100 K and the regulated power input assures an average life of 2000 hours.







Wall transformer, 120 VAC, 50/60 Hz to 24 VDC at 2.0 amps. 220 VAC version available

Current Regulation:

Built-in, ± 0.4%

Color Temperature:

3100° K

Bulb Life:

2,000 hrs. average (nominal)

Spectral Distribution:

Near blackbody


Aluminum, forced air cooled, Limited focus adjustment


SMA Fiber connector Type 905


Length 3.8 inches (9.8cm) Height 2.3 inches (5.9cm) Width 2.1 inches (5.7cm)


11 ozs. (0.3 kgs.)


  • Spare lamp ASB-W-020B
  • Mounting flange for 10mm fiber bundle
  • Optical bench mounts

Specify FC, ST or CS for specific fiber couplers.


One year


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