| 摘要 |
<p>PURPOSE:To stabilize an oscillating frequency by a method wherein primary diffraction light coming from a reflector type grading, out of the light generated by a diode, is applied back to the diode for the feedback of a selected wavelength to the diode. CONSTITUTION:The light oscillated by a diode 6 is diffused while travelling through a waveguide 2. The diffused light is converted into a parallel beam by a lens 3, and the parallel beam is supplied into a reflector type grading 5. The grading 5 is of a planar type and arranged at such an angle that a primary diffraction light 9 will travel the course back to a lens 3. The primary diffraction light 9 is converged in the lens 3, and then fed back into the laser diode 6. This means that a light with its wavelength specified by the grading 5 is fed back into the laser diode 6, which contributes to the stabilization of oscillating frequency.</p> |
