CN205195042U - Combination mode locking control ware - Google Patents
Combination mode locking control ware Download PDFInfo
- Publication number
- CN205195042U CN205195042U CN201520949362.5U CN201520949362U CN205195042U CN 205195042 U CN205195042 U CN 205195042U CN 201520949362 U CN201520949362 U CN 201520949362U CN 205195042 U CN205195042 U CN 205195042U
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- China
- Prior art keywords
- semiconductor saturable
- mirror
- fiber amplifier
- doped fiber
- polarization controller
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Abstract
The utility model discloses a combination mode locking control ware, it relates to laser instrument technical field. It includes that the semiconductor saturable absorbs mirror, erbium doped fiber amplifier, optics circulator, polarization controller and wavelength division multiplexer, and the semiconductor saturable absorbs the mirror and links to each other with the optics circulator, and optics circulator, erbium doped fiber amplifier, wavelength division multiplexer and polarization controller are consecutive, and polarization controller still links to each other with the optics circulator. The utility model discloses inserting the semiconductor saturable in the optic fibre ring cavity, to absorb the mirror be the effective method who realizes self -starting passive mode locking, and it has, and the pulse width is narrow, simple structure, compactness, with low costs, advantage such as the mode locking stable, the adjustment is simple.
Description
Technical field
The utility model relates to field of laser device technology, be specifically related to a kind of combination locked mode controller.
Background technology
Laser with active-passive lock mould can produce the ultrashort pulse of psec (ps) or femtosecond (fs) level, has wide application in various fields such as high speed optical communication, nonlinear optics, biomedicines.Wherein, fiber laser again because simple and compact for structure, stability is high, cost is low, the easy advantage such as integrated, receives great concern always.
The complicated structure of passive mode-locking fiber laser traditional at present, poor stability, uses inconvenience.
Utility model content
For the deficiency that prior art exists, the utility model object is to provide a kind of combination locked mode controller, and structure is simple, compact, reliable and stable, practical.
To achieve these goals, the utility model realizes by the following technical solutions: a kind of combination locked mode controller, comprise semiconductor saturable absorbing mirror, erbium-doped fiber amplifier, optical circulators, Polarization Controller and wavelength division multiplexer, semiconductor saturable absorbing mirror is connected with optical circulators, optical circulators, erbium-doped fiber amplifier, wavelength division multiplexer are connected successively with Polarization Controller, and Polarization Controller is also connected with optical circulators.
As preferably, described semiconductor saturable absorbing mirror is nonlinear device.
As preferably, described erbium-doped fiber amplifier is as gain media.
As preferably, in described optical circulators insertion chamber, form the travelling-wave cavity of one-way transmission.
Semiconductor saturable absorbing mirror in the utility model as nonlinear device, by its transmissivity of intensity control in chamber.Erbium-doped fiber amplifier, as gain media, provides the gain needed for ring cavity vibration.Optical circulators inserts the travelling-wave cavity forming one-way transmission in chamber.Because semiconductor saturable absorbing mirror performance is relevant to polarization state, so insert Polarization Controller (PC) in chamber to control polarization state.
The beneficial effects of the utility model: inserting semiconductor saturable absorbing mirror in fiber optic loop an actor's rendering of an operatic tune is the effective ways realizing self-starting passive mode locking, it has pulse width, structure is simple, compact, cost is low, locked mode is stablized, adjust the advantages such as simple.
Accompanying drawing explanation
The utility model is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is structural representation of the present utility model.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
With reference to Fig. 1, this embodiment is by the following technical solutions: a kind of combination locked mode controller, comprise semiconductor saturable absorbing mirror 1, erbium-doped fiber amplifier 2, optical circulators 3, Polarization Controller 4 and wavelength division multiplexer 5, semiconductor saturable absorbing mirror 1 is connected with optical circulators 3, optical circulators 3, erbium-doped fiber amplifier 2, wavelength division multiplexer 5 are connected successively with Polarization Controller 4, and Polarization Controller 4 is also connected with optical circulators 3.
It should be noted that described semiconductor saturable absorbing mirror 1 is nonlinear device.
It should be noted that described erbium-doped fiber amplifier 2 is as gain media.
In addition, described optical circulators 3 inserts the travelling-wave cavity forming one-way transmission in chamber.
This embodiment semiconductor saturable absorbing mirror used be one by semiconductor saturable absorber and the integrated device of Bragg mirror, be made up of Bragg mirror and quantum well absorption layer.The absorptivity A of saturated absorbing body depends on the light intensity in chamber, can be expressed as
A＝A0/[1+(I/Isat)]，
In formula, A0 is small-signal absorptivity, and Isat is saturated light intensity, and I represents light intensity in chamber.The saturated absorption rate Asat of semiconductor saturable absorbing mirror is determined by the transmissivity of Bragg mirror and the saturated absorption rate of quantum well absorber.The saturated absorption rate Asat=12% of semiconductor saturable absorbing mirror used, small-signal absorptivity A0=30% in experiment, therefore, its modulation depth is 18%.
When light intensity hour in chamber, in chamber, most of energy is absorbed by semiconductor saturable absorbing mirror; When light intensity increases, absorber is saturated, and in chamber, most of light energy can pass through absorber, is then reflected back toward in chamber.Laser with active-passive lock mould is exactly that this function of based semiconductor saturable absorbing mirror makes impulse phase locking in chamber, realizes coherent superposition, and paired pulses carries out compressing, shaping.In the modelocked fiber ring with semiconductor saturable absorbing mirror, the saturated absorption light intensity of semiconductor saturable absorbing mirror is less than the saturated light intensity of erbium-doped fiber amplifier.When light intensity in chamber increases to the comparable plan of saturated light intensity with absorber, but when being less than the saturated light intensity of erbium-doped fiber amplifier, when the core of pulse in chamber is by absorber, absorptivity is less, by being exaggerated during erbium-doped fiber amplifier, so constantly increased, and pulse base is decayed by being subject to larger absorption loss during absorber, so pulse constantly narrows, frequency spectrum is widened.
The width of mode-locked optical pulses determined primarily of the relaxation time of saturable absorber and the gain bandwidth of erbium-doped fiber amplifier.The relaxation time of semiconductor saturable absorbing mirror is less than 10ps, and the minimum relaxation time can reach 0.3ps.The relaxation time of general semiconductor saturable absorbing mirror is longer than the mode locking pulse duration, along absorbing after paired pulses.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. a combination locked mode controller, it is characterized in that, comprise semiconductor saturable absorbing mirror (1), erbium-doped fiber amplifier (2), optical circulators (3), Polarization Controller (4) and wavelength division multiplexer (5), semiconductor saturable absorbing mirror (1) is connected with optical circulators (3), optical circulators (3), erbium-doped fiber amplifier (2), wavelength division multiplexer (5) are connected successively with Polarization Controller (4), and Polarization Controller (4) is also connected with optical circulators (3).
2. one combination locked mode controller according to claim 1, it is characterized in that, described semiconductor saturable absorbing mirror (1) is nonlinear device.
3. one combination locked mode controller according to claim 1, it is characterized in that, described erbium-doped fiber amplifier (2) is as gain media.
4. one combination locked mode controller according to claim 1, it is characterized in that, described optical circulators (3) inserts the travelling-wave cavity forming one-way transmission in chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520949362.5U CN205195042U (en) | 2015-11-17 | 2015-11-17 | Combination mode locking control ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520949362.5U CN205195042U (en) | 2015-11-17 | 2015-11-17 | Combination mode locking control ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195042U true CN205195042U (en) | 2016-04-27 |
Family
ID=55788000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520949362.5U Expired - Fee Related CN205195042U (en) | 2015-11-17 | 2015-11-17 | Combination mode locking control ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195042U (en) |
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2015
- 2015-11-17 CN CN201520949362.5U patent/CN205195042U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20161117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |