Wide spectrum optical fiber light source with stable optical power and average wave length

An optical fiber light source and average wavelength technology, applied in the light source, electric light source, optics and other directions, can solve the problem of unstable light source output, and achieve the effect of simplifying the circuit hardware design, reducing the number, and improving the full temperature stability.

Inactive Publication Date: 2009-03-04
BEIHANG UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Optical path optimization and compensation technology can improve the average wavelength temperature stability of broadband fiber optic light sources to a certain extent, but in a wide temperature range of -45°C to +70°C, the output of the light source is unstable

Method used

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  • Wide spectrum optical fiber light source with stable optical power and average wave length
  • Wide spectrum optical fiber light source with stable optical power and average wave length
  • Wide spectrum optical fiber light source with stable optical power and average wave length

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Embodiment 1

[0047] According to the structure shown in FIG. 1 , a wide-spectrum optical fiber light source with stable optical power and average wavelength is connected, and the output light of the pigtail (B end) of the monitoring detector 3 is the final output. Connect the output light of the monitoring detector 3 to a fiber coupler with a split ratio of 50:50, and the two outputs of the coupler are respectively connected to an optical power meter (Agilent 8163A) and a spectrum analyzer (AQ6319).

[0048] Change the driving current of the pump source, scan the output spectrum with a spectrum analyzer, and obtain a set of average wavelength values. According to the measured data, the relationship between the average wavelength L and the driving current C can be obtained:

[0049] L(C)=1546.75318-0.00441×C (1)

[0050] Given pump source driving current C 0 =250mA, for the first time in the full temperature (-45℃~+70℃) experiment, the measured average wavelength change is 4.03ppm / ℃, and ...

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Abstract

The invention discloses a wide spectrum optical fiber source which has stable optical power and average wavelength. The optical fiber source comprises a microprocessor (1), a light signal acquisition circuit (2), a monitoring detector (3), a magneto-optical attenuator (4), a pump laser drive circuit (5), a temperature sensor (6), an attenuator drive circuit (7), a pump laser (11), a wavelength division multiplexer (12), an optical fiber ring (13), a gain flattening filter (14) and a fiber optic isolater (15); wherein, the pump laser (11), the wavelength division multiplexer (12), the optical fiber ring (13), the gain flattening filter (14) and the fiber optic isolater (15) form into the light path part of the wide spectrum optical fiber source; and the magneto-optical attenuator (4), the monitoring detector (3), the microprocessor (1), the pump laser drive circuit (5), the attenuator drive circuit (7), the light signal acquisition circuit (2) and the temperature sensor (6) form into the signal acquisition and processing part of the wide spectrum optical fiber source. The control device of the invention realizes the independence and simultaneous control of the two parameters of the average wavelength and the optical power through introducing the magneto-optical attenuator. The whole control system adopts whole digit mode and improves the stability of the average wavelength and the optical power of the wide spectrum optical fiber source.

Description

technical field [0001] The invention relates to a wide-spectrum optical fiber light source, more particularly, a wide-spectrum optical fiber light source with stable optical power and average wavelength. Background technique [0002] Broad-spectrum fiber optic light source is a broadband light source based on the principle of spontaneous emission amplification in erbium-doped fiber. Broad-spectrum fiber optic light source has the advantages of good temperature stability, spectral line width, high output power, and long service life. It is widely used in many fields such as optical sensing, optical communication, and optical testing; especially as one of the key components of high-precision optical fiber gyroscopes. First, factors such as wavelength, time coherence, power and average wavelength stability, and operating temperature range need to be considered. Therefore, there are high requirements for the power and wavelength stability of broadband fiber optic light sources. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72H05B37/00H05B37/02F21V8/00
CPCY02B20/42Y02B20/40
Inventor 杨远洪申彤赵冠成郭锦锦段玮倩
Owner BEIHANG UNIV
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