KR101891486B1 - Method of manufacturing saturable absorber and saturable absorber and laser generating apparatus using the same - Google Patents

Abstract

According to the present invention, the present invention relates to a method for manufacturing a saturable absorber, which can secure the uniformity of a process of manufacturing a saturable absorber, can omit a process such as drying or heat treatment due to use of the saturated absorber in a liquid state, can manufacture the saturable absorber by using various materials, can realize mass production of the saturable absorber, and can minimize contamination generated in a process of attaching the saturable absorber to optical fibers. According to the present invention, the method comprises: a step (a) of immobilizing an optical fiber onto a substrate; a step (b) of forming a saturable absorber attaching region onto the optical fiber after the step (a) is performed; a step (c) of preparing a filament including a saturable absorbent material; and a step (d) of outputting the filament to the saturable absorber attaching region by using 3D printing after the step (b) is performed. The step (c) includes: a step (c-1) of liquefying a pellet by using a solvent; a step (c-2) of adding the saturable absorbent material to the liquefied pellet; and a step (c-2) of extruding the pellet, to which the saturable absorbent material is added, to form the filament.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a saturated absorber using three-dimensional printing, and a saturated absorber using the same,

The present invention relates to a method of manufacturing a saturated absorber using three-dimensional printing and a saturated absorber and a laser generating apparatus using the method. More specifically, it is possible to ensure uniformity of a process for producing a saturated absorber, It is possible to manufacture a saturated absorbent by using various materials, mass production of a saturated absorbent can be realized, and it is possible to produce a saturated absorbent in the process of attaching a saturated absorbent to an optical fiber The present invention relates to a method of manufacturing a saturated absorber using three-dimensional printing, and a saturated absorber and a laser generating apparatus using the same.

The optical fiber laser is advantageous in that the beam alignment is simple, the beam splitting is excellent, and the maintenance cost is low as compared with the conventional bulk laser. In particular, pulsed lasers are used in a variety of applications such as optical measurement, laser processing, light detection and ranging (LIDAR), ultra-wideband light sources, optical sensors, nonlinear optical and laser surgery. Generally, pulsed lasers are classified into Q-switching and mode locking. The Q-switching scheme is a technique for generating pulses within a few microseconds by adjusting the Q value in the laser resonator. Mode locking is a technique for generating pulses within a few microseconds by synchronizing the resonance mode of the laser.

The Q-switching method and the mode locking method can be classified into an active method and a passive method, respectively. The active method is advantageous in that parameters such as pulse repetition rate and pulse width can be easily controlled by using an external modulator. However, since the active method generally uses an expensive external modulator and an RF signal generator, the entire laser system is bulky and expensive.

The passive method is a method using a saturated absorber. A saturated absorber refers to a device whose optical transmission increases in proportion to the intensity of light. The Q-switching laser system or the mode locking laser system implemented by the passive method is advantageous in that it can be downsized and can be realized at a low cost as compared with the Q-switching laser system or the mode locking laser system implemented by the active method .

The saturated absorber may be formed by, for example, applying a liquid containing metal nanomaterial particles to the end of the first optical fiber, heating the end of the first optical fiber, connecting the end of the first optical fiber and the end of the second optical fiber ≪ / RTI >

A saturated absorber for pulsed laser, a method of manufacturing a saturated absorber for pulsed laser, and a pulsed laser generator "filed on October 29, 2015 and registered on Mar. 2, 2017 by Seoul National University, Korean Patent No. 10-1713627 titled discloses a method of producing a saturated absorber using a liquid saturated absorber.

However, according to the method disclosed in Korean Patent No. 10-1713627, since a method of applying a liquid saturated absorber to an end portion of an optical fiber is used, a process such as drying or heat treatment must be performed indispensably. In addition, it can be applied to the case of producing a small amount of saturated absorber. However, it is not possible to ensure the uniformity of the process of producing the saturated absorber, since it varies depending on the skill of the operator. There is no disadvantage.

Saturable absorbers based on semiconductor materials can also be used as the saturated absorber. Though it can be implemented at a lower cost than the active method, expensive semiconductor processing equipment is required to fabricate a semiconductor material-based saturated absorber. And the operating wavelength of the saturated absorber is limited to several tens of nanometers.

In order to improve this, a method using a carbon nanotube and a material such as Graphene as a saturable absorber has been proposed. Using a material such as carbon nanotubes and graphene, an optical fiber such as a Q-switching laser and a mode- It has been experimentally proven to implement a pulsed laser. Korean Patent No. 10-1097175 entitled " Saturated Absorbent Containing Single-Layer Graphene and Its Manufacturing Method "filed on Jul. 09, 2010 and published on Dec. 15, 2011 by Ajou University Industry & Discloses a saturated absorber, in particular a saturable absorber comprising graphene. When a material such as carbon nanotubes and graphene is used as a saturated absorber, a saturated absorber that operates in a wide wavelength band can be manufactured.

On the other hand, the saturable absorber using the interaction of graphene with graphene fiber has polarization dependence. It has been confirmed that the pulse laser using the pulse laser can operate as a continuous oscillation laser, a Q-switching laser and a mode locking laser by using the same laser resonator by adjusting the polarization state in the laser resonator.

For example, in a paper entitled " Active control of all-fiber graphene devices with electrical gating ", published by Eun Jung Lee et al., A saturated absorber in which graphene-based transistors are formed on side-polished optical fibers is disclosed.

According to the above paper, the operating state of the laser according to the gate voltage can be changed to a continuous laser, a Q-switching laser and a mode locking laser. However, since a transistor has to be formed, the structure according to the above paper has a disadvantage that a very complicated and expensive semiconductor processing equipment is required. The graphene is also produced, for example, in a vacuum state. Therefore, contamination may occur during the process of attaching graphene produced in a vacuum state to, for example, an optical fiber, and this may adversely affect the characteristics of the saturated absorption body.

1. Korean Patent No. 10-1713627. 2. Korean Patent No. 10-1097175.

1. "Active control of all-fiber graphene devices with electrical gating", Eun Jung Lee et. al., Nature Communications 6, Article number: 6851, 2015

It is an object of the present invention to provide a process for producing a saturated absorbent which can ensure the uniformity of the process for producing a saturated absorbent and which can omit processes such as drying or heat treatment by using a saturated absorbent in a liquid state, The present invention provides a method of manufacturing a saturated absorber using three-dimensional printing, which can realize mass production of a saturated absorber and minimizes contamination occurring in the process of attaching a saturated absorber to an optical fiber.

It is another object of the present invention to provide a saturated absorber and a laser generating apparatus using the method of manufacturing a saturated absorber using the 3D printing.

According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, including: (a) fixing optical fibers on a substrate; (b) after the step (a) is performed, forming a saturated absorber attachment region on the optical fiber; (c) preparing a filament comprising a saturated absorbent material; and (d) outputting the filament using three-dimensional printing to the saturated absorber attachment region after the step (b) is performed, wherein the step (c) comprises: (c-1) Liquefying it with a solvent; (c-2) adding the saturated absorbing material to the liquefied pellet; And (c-2) extruding the pellet to which the saturated absorbent material is added to form the filament. The present invention also provides a method for producing a saturated absorber using three-dimensional printing.

In the method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, the step (b) includes the steps of: (b-1) polishing a part of the optical fiber so that the core of the optical fiber is not exposed, To form a region.

In the method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, the step (b) includes the steps of: (b-2) etching a part of the optical fiber so that the core of the optical fiber is not exposed, And forming an attachment region.

delete

In the method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, the pellet may include at least one of PLA (Poly Lactic Acid) resin, ABS (Acrylonitrile Butadiene Styrene) resin and PC (Polycarbonate) .

Also, in the method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, the saturated absorption material may include carbon nanotubes, graphenes, phase insulators, transition metal chalcogen compounds, Filled Skutterudites, (Black Phosphorus), gold nanoparticles, and transition metal oxides.

The present invention also provides a method of manufacturing a semiconductor device, comprising the steps of: (a) fixing an optical fiber on a surface of which a saturable absorber- (b) preparing a filament comprising a saturated absorbent material; And (c) after the step (a) is performed, outputting the filament using three-dimensional printing to the saturated absorbent attachment region, wherein step (b) comprises: (b-1) Liquefaction using a solvent; (b-2) adding the saturated absorbing material to the liquefied pellet; And (b-3) extruding the pellet to which the saturated absorbent material is added to form the filament. The present invention also provides a method of manufacturing a saturated absorber using three-dimensional printing.

In the method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, in the step (a), the saturable absorber-adhering region may be formed by polishing a part of the optical fiber such that the core of the optical fiber is not exposed, .

Further, in the method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, in the step (a), the saturated absorber-attaching area may be a part of the optical fibers tapered.

delete

In addition, in the method of producing a saturated absorber using three-dimensional printing according to the present invention, the pellet may include at least one of PLA resin, ABS resin, and PC resin.

Also, in the method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, the saturated absorbing material may be a carbon nanotube, a graphene, a phase insulator, a transition metal chalcogenide, a field scooter lidite, And transition metal oxides.

The present invention also provides a saturated absorber produced according to the above-described method for producing a saturated absorber using three-dimensional printing.

The present invention also provides a laser producing apparatus comprising a saturated absorber produced according to the above-described method for producing a saturated absorber using three-dimensional printing.

According to the present invention, it is possible to ensure the uniformity of the process for producing a saturated absorbent, to omit the process such as drying or heat treatment by using a saturated absorbent in a liquid state, and to produce a saturated absorbent using various materials Mass production of the saturated absorber can be realized, and contamination occurring in the process of attaching the saturated absorber to the optical fiber can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exemplary flow chart of a method of manufacturing a saturated absorber using three-dimensional printing according to a first embodiment of the present invention.
FIG. 2 is a plan view showing a state in which optical fibers are fixed on a substrate in a method of manufacturing a saturated absorber using three-dimensional printing according to a first embodiment of the present invention. FIG.
3 to 4 are views showing a state in which a saturated absorber attachment region is formed on an optical fiber in a method of manufacturing a saturated absorber using 3D printing according to the first embodiment of the present invention, ≪ RTI ID = 0.0 > a < / RTI >
5 is an exemplary flow chart of a step of preparing a filament comprising a saturated absorbent material in a method of making a saturated absorber using three-dimensional printing according to a first embodiment of the present invention.
6 is a view illustrating a state in which a filament is output using three-dimensional printing in a saturated absorber attachment region in a method of manufacturing a saturated absorber using three-dimensional printing according to the first embodiment of the present invention
7 is an exemplary flow chart of a method of manufacturing a saturated absorber using three-dimensional printing in accordance with a second embodiment of the present invention.
8 is a view showing a saturated absorber attachment region formed by tapering a part of an optical fiber in a method of manufacturing a saturated absorber using three-dimensional printing according to a second embodiment of the present invention.
9 illustrates nonlinear transmission curves of a saturated absorber produced according to a method of making a saturated absorber using three-dimensional printing according to an embodiment of the present invention.
10 is an exemplary block diagram of a laser producing device including a saturated absorber fabricated using a method of making a saturated absorber using three-dimensional printing in accordance with an embodiment of the present invention.
11 illustrates Q-switching pulses generated by the laser generation apparatus of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of manufacturing a saturated absorber using three-dimensional printing according to the present invention, and embodiments of a saturated absorber and a laser generating apparatus using the same will be described in detail with reference to the accompanying drawings. In the drawings for explaining embodiments of the present invention, for the sake of convenience of explanation, only a part of the actual structure is shown or a part thereof is omitted or shown, or the scales may be shown differently.

≪ Embodiment 1 >

Hereinafter, a first embodiment of the present invention will be described.

1 is an exemplary flow chart of a method of manufacturing a saturated absorber using three-dimensional printing according to a first embodiment of the present invention.

Referring to FIG. 1, an optical fiber is fixed on a substrate (S110).

2 is a plan view showing a state in which optical fibers are fixed on a substrate in a method of manufacturing a saturated absorber using three-dimensional printing according to a first embodiment of the present invention.

Referring to FIG. 2, an optical fiber 100 is fixed on a substrate 190.

 As the substrate 190, for example, a glass substrate or a substrate such as a silicon substrate can be used.

The optical fibers 100 may be bonded onto the substrate 190 using an adhesive material or fused by thermal melting.

The optical fiber 100 may be, for example, an erbium-doped optical fiber doped with erbium in a silica optical fiber, a thulium-holmium doped optical fiber doped with thulium-holmium in a silica optical fiber, or a ytterbium doped optical fiber doped with a ytterbium in a silica optical fiber . Alternatively, the optical fiber 100 may be another optical fiber used for a conventional optical fiber laser, etc. other than the optical fiber described above.

Referring again to FIG. 1, after step S110 is performed, a saturated absorber attachment region is formed on the optical fiber (S130).

3 to 4 are views showing a state in which a saturated absorber attachment region is formed on an optical fiber in a method of manufacturing a saturated absorber using 3D printing according to the first embodiment of the present invention, 1 is a view showing a part of a section along a line. The substrate 190 in FIG. 3 is not shown, and the scale and shape of the optical fiber 100 and the saturable absorber attachment region shown in FIG. 3 may not be fully consistent with the actual scale or shape for purposes of illustration.

Referring to FIG. 3, according to step S130, a part of the optical fiber 100 is polished so that the core 110 of the optical fiber 100 is not exposed, thereby forming the saturable absorber-attaching area 130.

Only a part of the cladding 120 and 125 of the optical fiber 100 is polished by a polishing apparatus (not shown) so that the core 110 of the optical fiber 100 is not exposed. A saturated absorber-attaching region 130 is formed. Referring to FIG. 3, only a portion of the upper cladding 120 of the claddings 120 and 125 of the optical fiber 100 is polished to form the saturable absorber attachment region 130.

On the other hand, the saturated absorbent attachment region 130 can be formed by etching the optical fiber 100, instead of polishing the optical fiber 100.

Referring to FIG. 4, according to step S130, a part of the optical fiber 100 is etched so that the core 110 of the optical fiber 100 is not exposed, thereby forming the saturable absorber-attaching area 130.

That is, only the part of the cladding 120, 125 of the optical fiber 100 is etched so that the core 110 of the optical fiber 100 is not exposed, Is formed. Referring to FIG. 3, only a portion of the cladding 120, 125 of the optical fiber 100 is polished to form a saturated absorber attachment region 130. 3, a portion corresponding to the cladding 125 below the optical fiber 100 is also etched to form the saturable absorber attachment regions 130 and 135. [

Referring again to FIG. 1, a filament containing a saturated absorbent material is prepared (S150).

5 is an exemplary flow chart of a step of preparing a filament comprising a saturated absorbent material in a method of making a saturated absorber using three-dimensional printing according to a first embodiment of the present invention.

Referring to FIG. 5, first, the pellet is liquefied by using a solvent (S151).

The pellet may comprise at least one of PLA resin, ABS resin and PC resin.

The solvent is, for example, an organic solvent.

Next, a saturated absorption material is added to the liquefied pellet through step S151 (S153).

The saturated absorbing material may include at least one of carbon nanotubes, graphene, phase insulators, transition metal chalcogen compounds, field scooter lidites, black lumps, gold nanoparticles, and transition metal oxides.

Next, the pellet to which the saturated absorbent material is added is extruded through step S151 to form filaments (S155).

Step S155 may be performed using a filament maker, for example.

Step S150 may be performed before, during or after, for example, step S110 or S130.

Referring again to FIG. 1, after step S130 is performed, the filament is output using the three-dimensional printing on the saturated absorber-adhered area (S170).

FIG. 6 is a view illustrating a state in which filaments are output using three-dimensional printing in a region where a saturated absorber is attached in a method of manufacturing a saturated absorber using three-dimensional printing according to the first embodiment of the present invention.

Referring to FIG. 6, there is shown a state in which the filament 150 is attached to the saturated absorbent attachment region 130 shown with reference to FIG.

As described above, according to the first embodiment of the present invention, a saturated absorber can be manufactured.

≪ Embodiment 2 >

A second embodiment of the present invention will be described below.

7 is an exemplary flow chart of a method of manufacturing a saturated absorber using three-dimensional printing according to a second embodiment of the present invention. The method of manufacturing a saturated absorber using 3D printing according to a second embodiment of the present invention will be described focusing on differences from the method of manufacturing a saturated absorber using 3D printing according to the first embodiment of the present invention.

Referring to FIG. 7, first, an optical fiber on which a saturable absorber attachment region is formed is fixed on a substrate (S210).

Unlike the method of producing a saturated absorber using three-dimensional printing according to the first embodiment of the present invention, step S210 of the second embodiment of the present invention is to fix the optical fiber on which a saturated absorber- . That is, instead of steps S110 and S130 of the first embodiment of the present invention, according to the second embodiment of the present invention, step S210 is performed.

The optical fiber having the saturated absorber-adhered region formed on its surface can be bonded onto the substrate using an adhesive material or fused by thermal melting.

The optical fiber in which the saturable absorber attachment region is formed on the surface thereof may be, for example, an erbium-doped optical fiber doped with erbium in a silica optical fiber, a thulium-holmium-doped optical fiber doped with thulium- It may be a ytterbium-doped silica fiber doped with ytterbium, or may be another optical fiber used for a conventional fiber laser.

For example, the saturable absorber attaching region may be formed by polishing or etching a part of the optical fiber such that the core of the optical fiber is not exposed. For example, as shown in FIG. 3 or FIG. 4, the optical fibers on which the saturable absorber-adhered regions 130 and 135 are formed are fixed on the substrate.

On the other hand, in step S210, the saturated absorber-attaching area may be a part of the optical fibers tapered.

8 is a view showing a saturated absorber attachment region formed by tapering a part of optical fibers in a method of manufacturing a saturated absorber using three-dimensional printing according to a second embodiment of the present invention.

Referring to Fig. 8, the saturable absorber attachment regions 130 and 135 are formed by tapering a part of the optical fiber 100. Fig. For example, the saturable absorber attachment regions 130,135 can be formed by extending the optical fiber 100 long while heating it

Through step S210, since the optical fiber on which the saturable absorber-adhered area is formed is fixed on the substrate, what has been performed in steps S110 and S130 in the first embodiment can be performed through one step S210.

However, the optical fiber in which the saturable absorber-adhered region is formed on the surface thereof is higher in breakage probability than the ordinary optical fiber. Therefore, the method of manufacturing a saturated absorber using three-dimensional printing according to the second embodiment of the present invention is more restrictive than the method of manufacturing a saturated absorber using three-dimensional printing according to the first embodiment of the present invention, It can be applied in an environment with low possibility of breakage.

Referring again to FIG. 7, a filament containing a saturated absorbing material is prepared (S250). Step S250 of the second embodiment of the present invention is substantially the same as step S150 of the first embodiment of the present invention. Therefore, step S250 of the second embodiment of the present invention is not described in detail.

Referring again to FIG. 7, after step S210 is performed, the filament is output using the three-dimensional printing on the saturated absorber-adhered area (S270). Step S270 of the second embodiment of the present invention is substantially the same as Step S170 of the first embodiment of the present invention. Therefore, step S270 of the second embodiment of the present invention is not described in detail.

As described above, according to the second embodiment of the present invention, a saturated absorber can be manufactured.

≪ Saturable absorber manufactured according to an embodiment of the present invention and a laser generating device using the same [

9 is a diagram showing a nonlinear transmission curve of a saturated absorber manufactured according to a method of manufacturing a saturated absorber using three-dimensional printing according to an embodiment of the present invention.

In order to derive the nonlinear transmission curve of FIG. 9, a saturated absorber was manufactured according to the first embodiment of the present invention, and a mode locking laser in the 1560 nm band was used as the incident light source. The pulse width of the mode locking laser was about 800 fs, and the pulse repetition rate was about 22 MHz. Referring to FIG. 9, the nonlinear transmission curve of the measured saturated absorber exhibits a nonlinear transmission characteristic of a typical saturated absorber in which the transmittance is low when the intensity of the incident beam is low, and the transmittance is gradually increased with the intensity of the incident beam. The modulation depth was measured to be about 60.5%.

Therefore, it can be confirmed that the saturated absorber produced according to the method of producing a saturated absorber using the three-dimensional printing of the present invention can operate as a saturated absorber.

10 is an exemplary block diagram of a laser generating device including a saturated absorber fabricated using a method of making a saturated absorber using three-dimensional printing in accordance with an embodiment of the present invention.

Referring to FIG. 10, the laser generating apparatus 300, that is, the laser resonator includes a saturated absorber 200 manufactured by using the method of producing a saturated absorber using three-dimensional printing according to the embodiment of the present invention, A material 210, an isolator 220, a polarization controller (PC) 230, a coupler 240, a wavelength division multiplexer (WDM) 250, a light source 260 ).

As the gain material 210, for example, an erbium-doped optical fiber of 2.3 m was used. An isolator 220 was used for unidirectional beam steering.

The polarization controller 230 was used to confirm the polarization state in the laser resonator.

As the coupler 240, 10% of the laser beam was output using a 90:10 coupler.

As the wavelength division multiplexer 250, for example, a 980/1550 nm wavelength division multiplexer was used.

As the light source 260, a 980 nm pump laser diode is exemplarily used.

10 is merely an exemplary configuration and is similar to the conventional configuration except that the saturable absorber 200 according to the present invention is used, and a detailed description thereof will be omitted.

It is needless to say that the scope of the present invention is not limited to this because the configuration of the laser generation apparatus 300 with reference to FIG. 10 is only an example. That is, the laser generation apparatus according to the present invention can be applied to various configurations as well as the configuration shown in FIG. 10, and particularly to the laser generation apparatus having the saturated absorption body 200 according to the present invention.

The results of experiments based on the exemplary configuration of FIG. 10 will be described below.

11 is a diagram showing Q-switching pulses generated by the laser generating apparatus of the present invention.

The pump power of the laser resonator was gradually increased and the output of the laser was measured using an optical spectrum analyzer and an oscilloscope. Since the pump power of the laser resonator became more than 60 mW, the laser resonator generated a Q-switching pulse. The Q-switching pulse was oscillated irrespective of the polarization state in the laser resonator and no longer produced when the pump power reached 150 mW.

Figure 11 shows Q-switching pulses measured at a pump power of 80 mW in particular. The center wavelength of the output Q-switching laser was about 1559 nm, and the average output power was measured at 0.7 mW. The pulse width and repetition rate were about 6.5 microseconds (μs) and 33.9 kHz, respectively.

As described above, according to the present invention, it is possible to ensure the uniformity of the process for producing a saturated absorbent, and omitting processes such as drying or heat treatment by using a saturated absorbent in a liquid state, The saturable absorber can be manufactured, mass production of the saturated absorber can be realized, and contamination occurring in the process of attaching the saturable absorber to the optical fiber can be minimized.

Although the present invention has been described in detail, it should be understood that the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications may be made without departing from the essential characteristics of the present invention. Will be possible.

Therefore, the embodiments disclosed in the present specification are intended to illustrate rather than limit the present invention, and the scope and spirit of the present invention are not limited by these embodiments. The scope of the present invention should be construed according to the following claims, and all the techniques within the scope of equivalents should be construed as being included in the scope of the present invention.

According to the present invention, it is possible to ensure the uniformity of the process for producing a saturated absorbent, to omit the process such as drying or heat treatment by using a saturated absorbent in a liquid state, and to produce a saturated absorbent using various materials Mass production of the saturated absorber can be realized, and contamination occurring in the process of attaching the saturated absorber to the optical fiber can be minimized.

100: optical fiber 110: core
120, 125: Cladding 130, 135: Saturated absorber attachment region
150: filament 190: substrate
200: Saturated absorber 210: Gain material
220: Isolator 230: Polarization controller
240: Coupler 250: Wavelength Division Multiplexer
260: light source 300: laser generating device

Claims (14)

(a) fixing optical fibers on a substrate;
(b) after the step (a) is performed, forming a saturated absorber attachment region on the optical fiber;
(c) preparing a filament comprising a saturated absorbent material;
(d) after the step (b) is performed, outputting the filament using three-dimensional printing to the saturated absorber-
, ≪ / RTI &
The step (c)
(c-1) liquefying the pellet with a solvent;
(c-2) adding the saturated absorbing material to the liquefied pellet; And
(c-2) extruding the pellet to which the saturated absorbent material is added to form the filament
Wherein the method comprises the steps of: The method according to claim 1,
The step (b)
(b-1) polishing a part of the optical fibers so as not to expose the core of the optical fiber to form the saturated absorber-attaching area
Wherein the method comprises the steps of: The method according to claim 1,
The step (b)
(b-2) etching a portion of the optical fiber such that the core of the optical fiber is not exposed to form the saturated absorber-adhering region
Wherein the method comprises the steps of: delete The method according to claim 1,
Wherein the pellet comprises at least one of PLA (Poly Lactic Acid) resin, ABS (Acrylonitrile Butadiene Styrene) resin and PC (Polycarbonate) resin. The method according to claim 1,
Wherein the saturated absorbing material comprises at least one of carbon nanotubes, graphene, phase insulators, transition metal chalcogen compounds, Filled Skutterudites, Black Phosphorus, gold nanoparticles and transition metal oxides ≪ RTI ID = 0.0 > 3-dimensional < / RTI > (a) fixing an optical fiber on the substrate on which a saturated absorber-adhered region is formed;
(b) preparing a filament comprising a saturated absorbent material; And
(c) after the step (a) is performed, outputting the filament using three-dimensional printing to the saturated absorbent attachment region
, ≪ / RTI &
The step (b)
(b-1) liquefying the pellet with a solvent;
(b-2) adding the saturated absorbing material to the liquefied pellet; And
(b-3) extruding the pellet to which the saturated absorbent material is added to form the filament
Wherein the method comprises the steps of: 8. The method of claim 7,
Wherein in the step (a), the saturable absorber-adhering region is formed by polishing or etching a part of the optical fiber so that the core of the optical fiber is not exposed. 8. The method of claim 7,
Wherein in the step (a), the saturable absorber attachment region is tapered at a portion of the optical fibers. delete 8. The method of claim 7,
Wherein the pellet comprises at least one of PLA resin, ABS resin and PC resin. 8. The method of claim 7,
Wherein the saturated absorbing material comprises at least one of carbon nanotubes, graphene, phase insulators, transition metal chalcogen compounds, field scooter lidites, black rinses, gold nanoparticles and transition metal oxides. A method of manufacturing an absorber. delete delete

Images