Home
TO Series Wavelength Stabilized TO Can Lasers
TO Series Wavelength Stabilized TO Can Lasers

SureLock™ 640 nm Wavelength Stabilized Laser Diode

Coherent’s 640 nm 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 Coherent PowerLocker® Volume Holographic Grating, ensuring precise, ultra-stable center wavelengths, low temperature dependence, and consistent optical performance over the locked region.

640 nm Single Mode, Single-Frequency

TO-Can Laser for Instrumentation

Specification Summary

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

Table 1: SureLock™ Specifications

1Please specify wavelength at time of order

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 – –

Table 2: SureLock™ Operating Specifications

2Non-Condensing
All specifications are at rated power with a case temperature of 25°C unless otherwise noted

Applications

Application
Raman Spectroscopy
HeNe Replacement
Metrology
Sensing
Bio-instrumentation
Analytical Instrumentation
Graphic Arts

Features & Benefits

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

Related Materials

Case Studies

Documents

Optical Feedback Warning

Optical Feedback Warning

SureLock™ Wavelength Stabilized Laser Diode User Manual

SureLock™ Wavelength Stabilized Laser Diode User Manual

Lifetime Aging Report

Lifetime Aging Report

640 nm, 658 nm and 685 nm SMSR Measurement

640 nm, 658 nm and 685 nm SMSR Measurement

Case Studies

Brochures

Extending Raman into the THz Domain

Extending Raman into the THz Domain

Extending Raman into the THz Domain