Cylindrical Diode
Cylindrical Diode

SureLock™ 633 nm Wavelength Stabilized Laser Diode

Coherent’s 633 nm High-Power Wavelength Stabilized Laser is a high-power, single frequency, collimated laser packaged in an ultra-compact, TO-can footprint, designed for HeNe replacement applications. The high operating power, narrowed linewidth, low power consumption, and broad temperature operating characteristics make it ideal for next-generation interferometer and analytical instrument designs, with 10x the power and 1/100th the size of a comparable HeNe laser. All SureLock™ Series lasers are stabilized using the Coherent PowerLocker® Volume Holographic Grating, ensuring precise, ultra-stable center wavelengths, low temperature dependence, and consistent optical performance over the locked region.

633 nm Single Frequency, Collimated

TO-Can Laser for Instrumentation

Specification Summary

Parameter Symbol Min Typ Max Unit
Output Power Po 40/70 mW
Center Wavelength P 632.5 632.9 633.25 nm
Linewidth Δλ 20MHz -
Central Stabilized Temperature Tc 15 25 35 °C
Stabilized Temperature Range Tr 10 °C

SureLock™ Specifications

Operating Specifications

Parameter Symbol Min Typ Max Unit
Threshold Current Ith 64 80 mA
Operating Current Iop 160 210 mA
Operating Voltage Vop 2.8 3.0 V
Beam Divergence, Perpendicular Qv <2 mrad
Beam Divergence, Parallel Qh <2 mrad
Differential Efficiency DE (dP/dI) 0.7 mW/mA
Operating Temperature2 Top 0 35 °C
Storage Temperature2 Ts -10 60 °C
Polarization 100:1
Polarization Orientation TE

SureLock™ Operating Specifications

All specifications are at rated power with a case temperature of 25°C unless otherwise noted



• HeNe Replacement
• Raman Spectroscopy
• Flow Cytometry
• Metrology
• Data Storage
• Interferometry
• Confocal Microscopy
• Particle Counting
• Fluorescence
• Nondestructive Testing

Features & Benefits

  • Compact 9 mm TO can footprint
  • Narrow spectral linewidth <20 MHz typical, 150 MHz maximum
  • Collimated output beam
  • Wavelength stability across operating range <0.01 nm/°C
  • Test Data provided with every laser
  • Narrow-band ASE filters available

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