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LS-2 - Raman Spectroscopy - Stabilized Dual Laser Source

LS-2 - Raman Spectroscopy - Stabilized Dual Laser Source

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  • LS-2 benchtop module
  • Suitable for SERDS analysis

The LS-2 LabSource component is a VBG®-stabilized dual-laser source, fully-integrated, benchtop module that supports Shifted Excitation Raman Difference Spectroscopy (SERDS). This device enables greatly increased spectral analysis of compounds that fluoresce or are actually in the existence of background fluorescence.
It features two fiber-coupled laser diode sources that are spectrally-narrowed and wavelength-stabilized via PD-LD’s proprietary VBG® system.

The LabSource is the exclusively device on the market to offer the combination of 2 laser sources with closely-spaced wavelengths (from 0.1 to approximately 1 nm) that is the underlying mechanism of SERDS research. The difference between the spectral outputs from these two kinds of sources permits high quality spectral details in the existence of background fluorescence.

The source is easy to manage either from the front side panel or even remotely by using the USB interface. External modulation, shutter control as well as analog power control are offered.
Almost any combination of two lasers with wavelengths at 647, 785, 830 and also 1064 nm can be found, along with other wavelengths can certainly be produced upon inquiry.
Furthermore, the LabSource contains an exclusive high-power fiber-optic switch with internal beam dump, which permits rapid switching between laser sources while making sure not any laser emission emerges from the output port in between the measurements.

The LabSource is intended for benchtop applications, where its SERDs features may be joined with available laboratory analytical devices. Caused by its small size in addition to convenience of setup, it is used with in a variety of setups within a lab.

The LabSource is qualified to any application in which fluorescence impedes traditional single-source Raman spectroscopy analysis, for example life sciences applications which require analysis of live tissue or organic subject. 


  • Two high power lasers, up to 1 watt
  • Narrow line width, < 0.1 nm
  • SERDS option available
  • Excellent wavelength stability, +/- 0.005 nm
  • Excellent power stability, +/- 1 %
  • Easy laser modulation, safe operation
  • Front panel display

  • Raman spectroscopy
  • Bioinstrumentation
  • Cytometry
  • Other uses where high power, narrow bandwidth, and stable power output are required


Optical Characteristics   Comments
Standard Wavelengths (nm) 647 785 830 1064 Multimode lasers
SERDS pairs available yes yes yes    
SERDS pair [λ1 – λ 2] [nm] 0.5 – 1.0 Custom adjustable
Center λ tolerance [nm] +/- 0.5  
Wavelength stability [nm] +/- 0.005 Over 8 hours
Line width [nm] Typ. 0.08; max. 0.10  
Line width [cm-1] Typ. 1.3; max. 2.4  
ASE suppression [dB] >40  


Power Characteristics         Comments
Output from fiber [mw] >500 >600 >600 >800 Multimode lasers
Adjustability % full power   10 - 100    
ACC Adjustment
APC Adjustment
Output power stability %   +/- 0.5   Over 8 hours
Noise RMS %   < 0.25    
Noise P – P %   < 1    
Digital modulation   10 kHz* (1)    
Analog modulation   10 Hz* (2)    
Power consumption [W]   30    
Warm up time [min]   1    

(1)         *1. Modulation is only available in ACC mode
(2)         *2. 10Hz in ACC mode only, APC mode is 0.5Hz