VBG Raman Laser Modules
Applications
  • Ultra narrow linewidths and low spectral noise
  • Four standard wavelengths of 640nm, 658nm, 685nm, & 785nm
  • Ultra-stable wavelength and output power
  • CW, analog modulation, or digital modulation
  • 1m, 50um or 100um fiber with SMA connector
Print View
Technical Question
Share This Page
Feedback
DescriptionSpecifications Models Catalog PDF

Newport’s Raman Laser Modules are available at four standard wavelengths of 640nm, 658nm, 685nm or 785nm. They come with 1m multi-mode fiber pigtails with SMA connectors and core diameters of 50um or 100um. All modules have low spectral noise and very narrow line-widths via a VBG (volume Bragg grating) which make them ideal for Raman spectroscopy, interferometry and holography applications. The Raman Laser Source Modules have the smallest spectral width of any visible diode laser source that Newport offers.

All self-contained RLx Series Raman Laser Source Modules have superior optical quality and ultra-stable temperature, wavelength and output power control. The RLx Series modules feature a precision current source and a PID temperature controller. They operate at 5VDC and this lower operating voltage helps to create less waste heat within the laser module, thereby increasing diode lifetime, efficiency and reliability. Three types of Raman sources are featured:

RLC Series - CW operation

RLA Series - Analog modulation of up to 20 MHz

RLD Series - Digital modulation (via TTL) of up to 100 MHz

To modulate the RLA Series from below-threshold (at 0 V) to full power (at +1 V) requires an external VDC analog input (not included). To modulate the RLD Series from below-threshold to full power requires a user-supplied external 0-5 V TTL modulation signal (0 V yields full power). Download the user's manual for complete operating instructions. The LQA-CAB is only required when the monitoring functions on the laser are to be used (see user manual for detail descriptions). The necessary wiring for modulation is included with every RLD and RLA series laser.

All modules require a 5 VDC power source. Newport's LPMS Series Power Supplies meet CDRH requirements by providing an interlock input, key enable switch, delayed start-up, and laser active indicator. These units must be ordered separately. Warranty is not applicable when a custom power supply is used to drive the module.

Typical Center Wavelengths:
  • 640 nm
  • 658 nm
  • 685 nm
  • 785 nm