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A tunable microfiber laser based on vernier effect and its preparation method

A vernier effect, micro-fiber technology, applied in the directions of lasers, laser parts, phonon exciters, etc., can solve the problems of tuning the number of wavelengths that cannot be lased by the laser, difficulty in size, etc. compact effect

Active Publication Date: 2016-08-17
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The device uses piezoelectric ceramics to change the parameters of the coupling area between the tapered fiber and the resonator to experiment with different wavelength tuning outputs. However, since the two micro-resonators are nested, it is difficult to independently adjust their size, and the laser cannot perform lasing wavelengths. tuning of numbers

Method used

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  • A tunable microfiber laser based on vernier effect and its preparation method
  • A tunable microfiber laser based on vernier effect and its preparation method
  • A tunable microfiber laser based on vernier effect and its preparation method

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Embodiment 1

[0082] Such as Figure 5 As shown, a 976nm pump laser 1 is used. R1 and R2 are the annular radii of the first and second micro-fiber resonators 6 and 7 respectively, adjusting the tuning transmission spectrum of the micro-fiber resonant structure 3 corresponding to the annular radii of the micro-fiber resonators 6 and 7, the two micro-fiber resonators The optical path ratio is β 1 S 1 / β 2 S 2 =10.5 / 11.5, the ring radius of the micro-fiber resonator 6 changes from 250 μm to 500 μm. In the figure, when the ring diameter of the micro-fiber resonator 6 is 250 μm, there is only one peak resonance peak in the 1532 nm to 1552 nm band; and when the ring diameter increases to 500 μm, there are three peak resonance peaks in the same band. It can thus be explained that the number and interval of lasing wavelengths of the laser can be tuned by adjusting the cavity lengths of the two micro-fiber resonators 6 and 7 .

Embodiment 2

[0084] Such as Figure 6 As shown, changing the external medium refractive index of the microfiber resonator 7, the external medium refractive index n 2 From 1.38 to 1.4, the number of resonance wavelengths of the microfiber resonant structure 3 in the corresponding 1532nm to 1552nm band changes from three to four, and the free spectral range decreases from 6nm to 5.89nm, indicating that the lasing of the external refractive index tunable laser is changed. Number, spacing and location of wavelengths.

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Abstract

The invention discloses a vernier effect based tunable microfiber laser and a production method thereof. The laser comprises a semiconductor pump laser (1), an active microfiber cascade resonance structure (3) and a spectrum analyzer (5). Pump laser light emitted from the semiconductor pump laser (1) is coupled into the active microfiber cascade resonance structure (3) through a first micro-nanofiber (2), and laser light generated by the active microfiber cascade resonance structure (3) is coupled through a second micro-nanofiber (2) to enter the spectrum analyzer (5). The microfiber laser has tenability, can monitor changes of external environment parameters (such as temperature and refractive index strain), and has the advantages of small size, compact structure, flexible design and the like, thereby being capable of meeting application requirements in different fields of curing material monitoring, environmental pollution monitoring such as gas and soil, biomedical detection and the like.

Description

technical field [0001] The invention relates to the technical field of optical fiber lasers and optical fiber sensing, in particular to a tunable laser based on a cascaded micro-fiber resonant structure. Background technique [0002] In the fields of fiber lasers and fiber sensing, fiber cascaded ring resonator technology has continued to be widely used. The reason is that the output spectrum of fiber cascaded ring resonators is based on the principle of the vernier effect. Compared with a single ring resonator, it has the advantages of high fringe fineness and adjustable free spectral range. However, since ordinary optical fibers are not sensitive to changes in the external environment, and the construction of cascaded resonators requires multiple coupling devices, the application of cascaded ring resonators made of ordinary optical fibers in the miniaturization and integration of optical devices is still limited. limitation. [0003] Micro-nano fiber refers to an optical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/082H01S3/102
Inventor 孙琪真徐志林贾卫华刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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