Ondax CleanLine™ Series ASE Filter Systems are a family of tightly integrated, pre-aligned, multi-element ASE Filter Modules designed to provide the enhanced narrow band, low noise, ASE-free laser performance required for ultra-low-frequency (low wavenumber) Raman spectroscopy, and other demanding spectroscopy or metrology applications. Incorporating our NoiseBlock™ ASE Suppression Filters and configured for fast, easy alignment and use with our SureBlock™ XLF Series Raman Filter Systems, the CleanLine™ family is based on our proprietary solid-state, ultra-narrow band Volume Holographic Filter technology, delivering unlimited lifetime, exceptional throughput, and ultra-stable environmental performance.

The CleanLine™ FS free-space filter system is an ultra-compact (3” or 75mm) filter system with integrated alignment irises and a built-in wavelength fine-tuning adjustment. The CleanLine™ LM-FS incorporates a SureLock™ LM Series wavelength-stabilized laser module along with a CleanLine™ FS. And the CleanLine™ LM-FC includes an optical isolator and various fiber-coupling options – making the CleanLine™ easily configurable for turn-key integrationinto your experiment, instrumentation, or Raman spectroscopy system.

Available for standard wavelengths of 785nm, 532nm, and 405nm. Custom wavelengths are available upon request.

ASE Free Singe Frequency Laser

CleanLineTM LM-FC with integrated ASE filters, optical isolator and fiber-coupled output

ASE Free Single Frequency Laser Source

CleanLineTM LM-FS with prealigned ASE filters and free space output








  • Exceptional ASE Suppression
    better than -80db below laser line
  • Stable, ultra-narrowband performance
    0.1nm bandwidth, Δλ =10pm/°C
  • Ultra-low frequency
    Raman spectroscopy
  • High resulotion metrology

Specification Summary
Table 1: CleanLine™ FS Specifications
Specification 405nm 532nm1 785nm Unit
ASE Suppression (below laser line), typical -80 -80 -80 db
Throughput1 (free space version), min/typical 55/60 65/70 70/75 % of incoming power
Temperature Stability 10 10 10 pm/°C

1CleanLine FS (free space) only.  Throughput specifications do not include isolator or fiber coupled versions.  Call for specifications on specific wavelengths or configurations.

Technical Data and Drawings

CleanLine ASE Filter and Laser Systems