SureLock™ 685 nm Wavelength Stabilized Laser Diode

Coherent’s 685 nm Wavelength Stabilized Laser Diode is a single mode, single frequency laser packaged 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 Coherent PowerLocker® Volume Holographic Grating, ensuring precise, ultra-stable center wavelengths, low temperature dependence, and consistent optical performance over the locked region.

685 nm Single Mode, Single-Frequency

TO-Can Laser for Instrumentation

Specification Summary

Parameter Symbol Min Typ Max Unit
Output Power Po 45 mW
Center Wavelength1 LP 684 685 686 nm
686 687 688 nm
Linewidth Δλ 50 MHz
Central Stabilized Temperature Tc 15 40 °C
Stabilized Temperature Range Tr 10 15 °C

SureLock™ Specifications

1Please specify wavelength at time of order

Operating Specifications

Parameter Symbol Min Typ Max Unit
Threshold Current (CW) Ith 35 60 mA
Operating Current Iop 75 140 mA
Operating Voltage Vop 2 2.7 3 V
Laser Reverse Voltage Vrl 2 V
Monitoring Output Current Im 0.05 0.3 2.5 MA
Beam Divergence, Perpendicular Qv 16 20 25 degs
Beam Divergence, Parallel Qh 8 10.5 14 degs
Off Axis Angle, Perpendicular dQv -2.5 2.5 degs
Off Axis Angle, Parallel dQh -2 2 degs
Differential Efficiency DE (dP/dI) 0.9 mW/mA
Operating Temperature2 Top 0 50 °C
Storage Temperature2 Ts -10 60 °C
Polarization 100:1
Polarization Orientation TE

Table 2: SureLock™ Operating Specifications

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



• Raman Spectroscopy
• Metrology
• Sensing
• Bio-instrumentation
• Analytical Instrumentation
• Graphic Arts

Features & Benefits

  • Single frequency performance
  • Narrow linewidth <50 MHz
  • Wavelength stability 0.015 nm/°C
  • Coherence length >2 m
  • Compact, hermetically sealed TO footprint
  • Narrow-band ASE filters available

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