High-power broadband ASE (Amplified Spontaneous Emission) light source in 1064 nm waveband

Abstract

The invention provides a high-power broadband ASE (Amplified Spontaneous Emission) light source in 1064 nm waveband, comprising a beam combiner, a section of YDF (Ytterbium Doped Fiber), an optical isolator, a fiber end cap, a semiconductor pump laser and a section of YDF in certain length. The invention is characterized in that: a light output end only needs to be welded with a small section of YDF in non-pumping state, the secondary absorption effect of the YDF on ASE optical signals is utilized, and an ASE spectrum shape is effectively processed and flatly outputted. An optical path box in which the YDF is wound is arranged on a temperature-controllable simple heating plate, the working temperature of the YDF is adjusted and controlled, the ASE spectrum shape is further outputted flatly, and the ASE light output spectrum bandwidth is effectively improved. Besides, in the non-output direction, the fiber end cap based on small-section multimode fiber grinding and coating manner is welded for restraining the light reflection on the end surface of the fiber, the laser output formed by self-oscillation is avoided, the pumping power is ensured to be improved, and meanwhile, the scale of ASE light output power is effectively improved.

Description

technical field [0001] The invention relates to a light source used in the fields of optical fiber sensing, optical fiber communication, and optical device measurement, in particular to an ASE optical fiber light source with high output power and broadband in the 1064nm band. Background technique [0002] The 1064nm band ASE light source is based on the principle of Amplified Spontaneous Emission (Amplified Spontaneous Emission) doped rare earth fiber, referred to as ASE light source. Compared with low-output power, ultra-broadband light-emitting diodes (LEDs) or superluminescent light-emitting diodes (SLDs), one of the ASE light sources provides high amplification gain through a section of ytterbium-doped optical fiber, which not only obtains higher-power broadband radiation , and it is easy to effectively couple with the optical fiber system; the energy level of the second rare earth ytterbium ion is more stable than that of the semiconductor diode, so the ASE light source...

AI Technical Summary

Problems solved by technology

For the writing of GFF for flat 1064nm band ASE, the writing cost is relatively high at present, the process operation is difficult, and the degree of commercialization is not high

And access to GFF to filter out part of the ASE light at the peak, which will greatly reduce the output power level and waste costs

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