RO Series Round Laser Modules
RO Series Round Laser Modules

SureLock™ RO Series/Round Laser Modules

Now Available in 633 nm

Coherent’s RO Series Single Frequency Collimated Laser Module integrates our SureLock wavelength-stabilized lasers with active TEC cooling and precision current control circuitry into a compact, cylindrical package. Designed for easy mounting and integration, this rugged self-contained module is ideal for incorporation into precision instrumentation or for laboratory applications.

The built-in temperature controller maintains the laser diode temperature within ±0.01°C, resulting in excellent power stability that varies less than 1% over the long term. The NEW RO-USB Series incorporates a USB interface to add remote current and temperature control.

The RO Module is NOW AVAILABLE IN 633 nm and in wavelengths up to 808 nm to suit any application.

Single Frequency Performance for

Precision Instrumentation or Laboratory Applications

Specification Summary

Parameter Wavelengths Unit
Center Wavelength Lp 633 638 658 685 690 780.25 785 808 nm
Center Wavelength Tolerance Lp +/-0.25 +/-1 +/-1 +/-1 +/-1 +/-0.2 +/-1 +/-1/td> nm
Output Power Po 40/70 30 30 40 40 75 75/100 110 mW
Beam Size mm 0.6 X 0.9 1 X 1.3 0.7 X 1.1 0.9 X 1.4 0.9 X 1.5 0.8 X 1.4 0.9 X 1.7 0.9 X 1.7 mm
Linewidth, Max Δλ 150 300 300 50 50 50 50 50 MHz

Operating Specifications

SureLock™ Operating Specifications
Optical Min Typ Max Unit
Spatial Mode Single Mode
Polarization 100:1
Noise (RMS, 0-20 MHz) 0.25 0.5 %
Beam Divergence 1 10 mrad
Pointing Stability +/-25 µrad
Power Stability (1hr) 0.10 0.5 %
SureLock™ Operating Specifications
Electrical Min Typ Max Unit
Operating Current 3 A
Operating Voltage 3.3 VDC
Modulation Input(TTL) 0 5 VDC
Modulation Speed 3 kHz
SureLock™ Operating Specifications
Environmental Min Typ Max Unit
Storage Temperature 0 40 °C
Operating Temperature 10 25 40 °C
Operation Humidity Non-Condensing
Dimensions (D X L) 25.4 x 76.2 mm



HeNe Replacement
Raman Spectroscopy
Graphic Arts
Analytical Instrumentation

Features & Benefits

  • Single frequency performance
  • Precision cooling and current control
  • Remote Control via USB (RO-USB)
  • Wavelength stability 0.015 nm/°C
  • Noise <0.3% RMS
  • Collimated output beam
  • Power supply
  • Custom wavelengths available

Related Materials

Please Read Before Continuing

Risk factors: Except for the historical information contained here, many of the matters discussed in this Web site are forward-looking statements, based on expectations at the time they were made, that involve risks and uncertainties that could cause our results to differ materially from those expressed or implied by such statements. These risks are detailed in the “Factors That May Affect Future Results” section of our latest 10-K or 10-Q filing. Coherent assumes no obligation to update these forward-looking statements.

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