Wavelength Stabilized Diode Laser Module with Limited Back Reflection

摘要

A module is configured with a housing enclosing a diode laser. Fast and slow axes collimators are located behind the rear facet of the laser, which along with a front facet, defines an intra-cavity cavity of the laser. The facets are partially transmissive to light and therefore emit laser light. A wavelength selective optical element is aligned with the collimators and configured to reflect light emitted through the back facet and processed by collimators back into the intra-cavity. As a result, the laser beam is emitted through the front facet at a wavelength locked on the desired wavelength of the optical element. A delivery fiber is mechanically coupled to the front facet of diode laser and configured to receive and guide the emitted laser beam along the path of light.

主权项

1. A module, comprising:
a diode laser having rear and front facets which define an intra-cavity therebetween, the facets being partially transmissive to light; a spectrally selective optical element spaced from and opposing the rear facet of the diode laser, the optical element being configured to reflect at least a portion of the light back into the intra-cavity so as to lock a wavelength range of laser beam to a wavelength range of the optical element; and a fiber directly coupled to the front facet of the diode laser and configured to guide the light at the locked wavelength along a light path.