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Stabilized Tungsten-Halogen Light Source

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Stabilized Broadband Light Sources




  • Fiber-Coupled Light Sources for 300 - 2600 nm or 450 - 5500 nm
  • Stabilized Color Temperature and Output Power
  • Long Lifespan: 10,000 Hours

Features

  • Broadband Light Sources for Visible Through IR Wavelengths
  • Constant Intensity and Color Temperature
    • Light Power Drift: 0.01%/hr
    • Color Temperature Drift: 0.1%/°C
  • Closed-Loop Control for High Stability
    • Light Power Stability: 0.05%
    • Color Temperature Stability: ±15 K
  • 10,000 Hour Lifespan
  • SMA Fiber Interface
  • Accepts Ø1" and Ø25 mm Filters
  • Compatible with 30 mm Cage System
  • Low-Noise Fan Cooling
  • Replacement Bulb Modules Sold Separately

 

Item #SLS201(/M)SLS202(/M)
Wavelength Range 300 - 2600 nm 450 - 5500 nm
Peak Wavelength 1000 nm 1500 nm
Light Power Stabilitya 0.05%
Power Drift per Hour 0.01%
Power Drift per °C 0.1%
Color Temperature 2796 K 1900 K
Color Temperature Stability ±15 K
Dimensions (L × W × H) 194.1 mm × 55 mm x 57 mm (7.64" × 2.16" x 2.24")
Bulb Power 9 W 7.2 W
Coupled Power 10 mWb 100 mWc
Included Fiber Patch Cable M28L01 N/A
Lifespan 10,000 Hours
Included Power Supply Universal AC/DC Converter, 90 - 264 VAC at 47 - 63 Hz, 12 VDC

 

  • Measured at the Output of the Included Patch Cable
  • Measured Directly Over the Clear Aperture of the SMA Port

Thorlabs' Stabilized Light Sources provide a constant-intensity blackbody radiation spectrum between 300 and 2600 nm or 450 and 5500 nm. An internal feedback system is employed to achieve a highly stable power output. These devices feature an integrated filter holder and a fiber-coupled output with an SMA connector. The superior performance of Thorlabs' stabilized light sources makes them ideal for experiments that require high accuracy and stability, such as transmittance and reflectance measurements. The compact design (see table to the right for specific dimensions) gives the user flexibility with positioning this light source on a crowded optical table. Additionally, indents in the side of the casing allow the device to be secured to an optical table with 1/4"-20 (M6) cap screws without increasing the footprint. Alternatively, the SLS201(/M) and SLS202(/M) can be post mounted by using the two 1/4"-20 (M6) taps on the bottom of the device and our Ø1" posts.

The front face features four 4-40 taps (as shown in the image to the right) for ER rods, making this device compatible with Thorlabs' 30 mm cage systems. The back face has an on/off toggle switch and a laser engraving indicating the required voltage for the device (see image to the bottom left). This filter holder can accommodate Ø1" and Ø25 mm optics up to 0.31" (8.0 mm) thick, allowing bandpass filters to be placed in the light path for applications requiring constant-intensity illumination at a specific wavelength. Alternatively, a sample can be installed in the filter holder between two glass plates, allowing this light source to be used for material analysis. An included SM1RR retaining ring is used to secure the optic inside the holder. We recommend the SPW602 spanner wrench to secure the retaining ring without damaging the optic. The filter holder can be locked into place with a setscrew located on the side of the device (see the image to the bottom right). The light sources are also compatible with the CFH2-F filter holder (sold separately below), enabling the user to quickly change between different filters or samples.


Stabilized Tungsten-Halogen Light Source, 300 - 2600 nm

  • 300 - 2600 nm Stabilized Light Source
  • Includes M28L01 Fiber Patch Cord and Universal Power Supply
  • >10 mW Coupled Power Through Included Patch Cable
  • Replacement Bulb Module Sold Below

 

Thorlabs' Stabilized Tungsten-Halogen Light Source provides a constant-intensity, 10 mW blackbody radiation spectrum between 300 and 2600 nm. Since the blackbody spectrum spans both the visible and near-infrared spectral ranges, this source is ideal for integration into optical measurement equipment. Combine the stabilized light source with a reflection probe and spectrometer for diffuse reflection and fluorescence measurements or use it to back-illuminate a test target as part of a detector calibration system. It can also be used as an illumination source in a white light interferometer for applications such as mapping surface structure. The included customized filter holder is machined to match the height of the case and is also red anodized. It is interchangeable with the CFH2-F filter holder.

 

The SLS201 is shipped with a 1 m long, 0.39 NA, step-index, multimode SMA fiber patch cable with a Ø400 µm core size. This configuration provides 10 mW of coupled output power. Smaller core sizes and numerical apertures or longer fibers can be used at the expense of the output power while a larger core size or shorter fiber length can increase the output power. The S120-SMA fiber adapter on the front of this light source is removable and can be replaced with any internally SM1-threaded fiber adapter. An internal fan keeps the light source temperature regulated. This fan is low noise and engages only when the internal temperature exceeds 65 °C. The SLS201(/M) includes a universal AC/DC power converter capable of accepting 90 - 264 VAC at 47 - 63 Hz and comes in a latchable storage case that houses everything included with this device. A hex wrench is also included to remove fiber connector if desired.

 

Stabilized Tungsten IR Light Source, 450 - 5500 nm

  • 450 - 5500 nm Stabilized Light Source
  • Includes a Universal Power Supply
  • >100 mW Power Measured Over the Clear Aperture of the SMA Port
  • Recommended for Use with Our Mid-IR Fluoride Fibers
  • Replacement Bulb Module Sold Below

 

Thorlabs' Stabilized Tungsten IR Light Source provides a constant-intensity blackbody radiation spectrum between 450 and 5500 nm. Since the blackbody spectrum spans the visible and mid-infrared spectral ranges, this source is ideal for integration into Mid-IR measurement and analysis systems. The S120-SMA fiber adapter on the front of this light source is removable and can be replaced with any internally SM1-threaded fiber adapter. A MIR Fluoride fiber is recommended for use with this device. The included customized filter holder is machined to match the height of the case and is also red anodized. It is interchangeable with the CFH2-F filter holder.

 

An internal fan keeps the light source temperature regulated. This fan is low noise and engages only when the internal temperature exceeds 65 °C. The SLS202(/M) includes a universal AC/DC power converter capable of accepting 90 - 264 VAC at 47 - 63 Hz and comes in a latchable storage case that houses everything included with this device. A hex wrench is also included to remove fiber connector if desired.

 

Replacement Light Bulb Modules

  • SLS251: Replacement Tungsten-Halogen Bulb for SLS201(/M) Stabilized Light Source
  • SLS252: Replacement Tungsten IR Bulb for SLS202(/M) Stabilized Light Source
Item #SLS251SLS252
Compatible Stabilized Light Source SLS201(/M) SLS202(/M)
Bulb Type Tungsten-Halogen Tungsten IR
Bulb Power 9 W 7.2 W
Color Temperature 2796 K 1900 K

 

The SLS251 and SLS252 are replacement light bulb modules for the SLS201(/M) tungsten-halogen and SLS202(/M) tungsten IR stabilized light sources, respectively. Each bulb module comes with installation instructions and a 1.5 mm balldriver / hex key, which is needed during the installation process. Please see the Bulb Replacement tab for detailed bulb replacement instructions. Be sure to install the correct bulb in its corresponding lamp, as the bulbs are not interchangeable.

 

Note: We strongly recommend wearing gloves when replacing the bulb in either of our stabilized light sources to prevent skin oils from being deposited onto the bulb. If you suspect the bulb is dirty, carefully clean it with alcohol before connecting it to a power supply.

 

Extra Filter Holder for Ø1" Optics

  • Replacement for Filter Holder Included with SLS201(/M) and SLS202(/M)
  • Mounts Ø1" or Ø25 mm Optics up to 0.31" (8.0 mm) Thick
  • SM1-Threaded (1.035"-40) Bore

This filter holder accommodates Ø1" or Ø25 mm optics up to 0.31" (8.0 mm) thick and can be used as a replacement for or in addition to the filter holders included with the SLS201(/M) and SLS202(/M). With multiple filter holders, filters can be quickly swapped in and out of the stabilized light sources. The optic is secured against the back lip of the mount using the included SM1RR retaining ring. The top plate features two laser-engraved boxes for labeling and identification of the mounted optic.

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