SureLock™ 640nm Wavelength Stabilized Laser Diode

Ondax’s 640nm Wavelength Stabilized Laser Diode is a single mode, single frequency laser in an ultra-compact TO-can footprint. The extremely narrow linewidth, broad temperature operating characteristics and low power consumption deliver affordable, portable instrument-quality performance for a broad range of instrumentation applications.All SureLock™ Series lasers are stabilized using the Ondax PowerLocker® Volume Holographic Grating, ensuring precise, ultra-stable center wavelengths, low temperature dependence and consistent optical performance over the locked region.

TO Series Wavelength Stabilized TO Can Lasers


  • Single frequency performance
  • Narrow linewidth <150MHz
  • Wavelength stability <0.015nm/°C
  • Coherence length >2m
  • Compact, hermetically sealed TO footprint
  • Narrow-band ASE filters available


  • Raman Spectroscopy
  • HeNe Replacement
  • Metrology
  • Sensing
  • Bio-instrumentation
  • Analytical Instrumentation
  • Graphic Arts
Table 1: SureLock™ Specifications
Parameter Symbol Min Typ Max Unit
Output Power Po 32 mW
Center Wavelength1 LP 639 640 641 nm
Linewidth Δλ 150 MHz
Central Stabilized Temperature Tc 15 40 °C
Stabilized Temperature Range Tr 5 10 °C

1Please specify wavelength at time of order

Table 2: SureLock™ Operating Specifications
Parameter Symbol Min Typ Max Unit
Threshold Current Ith 40 60 mA
Operating Current Iop 60 80 mA
Operating Voltage Vop 2.3 2.5 V
Laser Reverse Voltage Vrl 2 V
Monitoring Output Current Im 0.05 0.15 0.4 MA
Beam Divergence, Perpendicular Qv 25 30 35 Degrees
Beam Divergence, Parallel Qh 6 8 10 Degrees
Off Axis Angle, Perpendicular dQv -2 2 Degrees
Off Axis Angle, Parallel dQh -2 2 Degrees
Emitter Size 1 x 3 µm
Differential Efficiency DE (dP/dI) 0.5 mW/mA
Operating Temperature2 Top 0 40 °C
Storage Temperature2 Ts -10 60 °C
Polarization 100:1
Polarization Orientation TM

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