Importance

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Abstract

The present invention discloses a light emitting module and a method for generating ultrabroadband near-infrared light and increasing the bandwidth and output power. The light emitting module includes a linearly polarized laser pump for generating a visible laser, a half-wave plate for adjusting the to polarization orientation of the visible laser, and a crystal optical fiber disposed on the output light path of the half-wave plate. The core of the crystal optical fiber is made of forsterite (Mg₂SiO₄) doped with Cr³⁺ and Cr⁴⁺ ions. The doping process comprises: depositing a chromium oxide layer on the lateral surface of the core and driving the chromium atoms into the core by high temperature diffusion; coupling the visible laser into the core to produce a spontaneous emission with wavelengths from 750 to 1350 nm continuously. Particularly, the continuous spectrum is adjustable by changing the polarization orientation of the visible laser via the half-wave plate.

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First Claim