External Cavity Diode Lasers (ECDLs)

  • Description
  • Specifications
  • Related Products


Real-world atomic sensors and other exacting applications require laser sources with specific size, environmental, and optical characteristics, placing unique constraints that most commercial laser systems do not meet. AOSense has developed a line of external cavity diode lasers (ECDLs) designed to meet these needs, offering narrow linewidth in a compact package.

Our AOSense ECDL is built on a semi-monolithic bench with a cat’s-eye design for stable operation in demanding environments. The wavelength is factory-set to the desired user wavelength; no subsequent mechanical adjustment is required. A PZT may be used for ~GHz tuning in addition to current and temperature controls. Current wavelengths include alkali (767 nm, 780 nm, 852 nm) and alkaline earth (423 nm, 461 nm, 657 nm, 689 nm, 698 nm) transitions. Additional UV/blue models at 369 and 399 nm are currently in development. The flexible design is fully translatable to additional wavelengths. The output beam is circularized to optimize fiber coupling (not available for all wavelengths). The compact laser enclosure dimensions are only 3″x1.5″x1.1″.

ECDL linewidth
The plot above shows a heterodyne beatnote between two free running lasers at 780 nm. Measurement of the -20 dB width indicates an instantaneous linewidth <30 kHz FWHM. Linewidth is wavelength dependent and ranges from 30-300 kHz. Injection locking configurations are also available.

AOSense ECDL Portfolio

ECDL Model #SILC Model #ConfigurationPopt (mW)Fiber coupled with Isolator Popt (mW)
AOS-IF-ECDL-1038AOS-SILC-P-2001020 nm40-
AOS-IF-ECDL-935AOS-SILC-P-100935 nm (Yb+)4522.0
AOS-IF-ECDL-852AOS-SILC-P-200852 nm (Cs)5322.0
AOS-IF-ECDL-813AOS-SILC-P-200813 nm (Sr)37.516.0
AOS-IF-ECDL-795AOS-SILC-P-200795 nm (Rb)4217.0
AOS-IF-ECDL-780AOS-SILC-P-200780 nm (Rb)4519.0
AOS-IF-ECDL-762AOS-SILC-P-200762 nm (Rb)3715.0
AOS-IF-ECDL-690-HPAOS-SILC-P-100707 nm (Sr)37.518.0
AOS-IF-ECDL-690-HPAOS-SILC-P-100698 nm (Sr)30.014.0
AOS-IF-ECDL-690-HPAOS-SILC-P-100689 nm (Sr)37.518.0
AOS-IF-ECDL-690-HPAOS-SILC-P-100688 nm (Sr)18.88.0
AOS-IF-ECDL-690AOS-SILC-P-100679 nm (Sr)10.04.5
AOS-IF-ECDL-657AOS-SILC-P-100657 nm (Ca)156.0
AOS-IF-ECDL-690AOS-SILC-P-100650 nm (Ba+)157.0
AOS-IF-ECDL-650 AOS-SILC-P-200649 nm (Yb)157.0
AOS-IF-ECDL-493AOS-SILC-P-100-B493 nm (Ba+)157.0
AOS-IF-ECDL-461 AOS-SILC-P-400-B461 nm (Sr)11058.0
AOS-Slave-461AOS-ILC-P-500-B461 nm (Sr)500.0-
AOS-IF-ECDL-461AOS-SILC-P-400-B457 nm (Mg)10050.0
AOS-Slave-423AOS-ILC-P-100-B423 nm (Ca)120-
AOS-IF-ECDL-423AOS-SILC-P-100-B423 nm (Ca)3817.0
AOS-IF-ECDL-413AOS-SILC-P-200-B413 nm (Ba+)21.59.5
AOS-IF-ECDL-399AOS-SILC-P-200-B399 nm (Yb)156.5
AOS-IF-ECDL-399AOS-SILC-P-200-B397 nm (Ca+)73.0
AOS-IF-ECDL-369AOS-ILC-P-200-B369 nm (Yb)7.02.5
Note: 1.) Other wavelengths/configurations available upon request. We have an extensive history of working closely with customers on custom laser builds.
Note: 2.) Output power of the 461 nm ECDL is being qualified at higher powers.

Download data sheets for 461nm ECDL and slave laser:


Model Number:AOS-IF-ECDL-λ
Dimensions (LxWxH), inchesCompact: 3″x1.5″x1.1″
Standard Wavelengths (factory tuned at GHz level)461, 493, 650-980 nm
UV/Blue Wavelengths in development369, 399 nm
Output power20-80 mW
Linewidth<200 kHz typical
Beam circularization optionSelect models
Mode-hop-free tuning range (piezo + FFWD current)>10 GHz
Mode-hop-free tuning range (piezo only)2-5 GHz typical
Tuning range (current + piezo + temperature)30-100 GHz
Memory (serial number, safety limits, settings, operation)NVRAM, in laser head

Please visit our Integrated Laser Controller (ILC) page to learn about our easy and high performance hardware and software solution to control laser current, PZT, and temperature.