CN101562308A - Pumping mode for array type optical waveguide amplifier - Google Patents
Pumping mode for array type optical waveguide amplifier Download PDFInfo
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- CN101562308A CN101562308A CNA2009100594174A CN200910059417A CN101562308A CN 101562308 A CN101562308 A CN 101562308A CN A2009100594174 A CNA2009100594174 A CN A2009100594174A CN 200910059417 A CN200910059417 A CN 200910059417A CN 101562308 A CN101562308 A CN 101562308A
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Abstract
The invention provides a pumping mode for an array type optical waveguide amplifier, belongs to the technical field of optical communication, and relates to the technology of optical waveguide. Side pumping is carried out on a whole optical waveguide array by using a linear array semi-conductor laser diode as a pumping source so as to improve the pumping efficiency; and a cylindrical lens is used to couple the diode array and a wave guide zone so as to improve the utilization ratio of the pumping source. The pumping mode adopts a Bar strip of the array type semi-conductor laser diode to carry out side pumping, so that pumping light can be pumped on the whole path of waveguide surface transmission, and the pumping energy acquired by the wave guide in average unit length is far higher than that of the end face pumping mode so as to obtain larger gain. The pumping mode can be widely applied to an array integrated optical device.
Description
Technical field
The pump mode of array type optical waveguide amplifier belongs to the optical communication technique field, relates to optical waveguide technique.
Background technology
Along with the progress of expanding economy and science and technology, people have higher requirement to communication system, and this has also brought out the appearance of many new and high technologies, and optical amplifier technology is the revolution of fiber optic communication field.It has carries out real-time, online, broadband, high-gain, low noise, low-power consumption and to the transparent direct enlarging function of wavelength, speed and modulation system, is an epoch-making milestone on the optical fiber communication development history light signal.And optical waveguides amplifier is compared with fiber amplifier, the gain of low cost of manufacture, unit length height, compact conformation, be easy to integrated with other optics, can on same substrate, provide passive and source light path is arranged, so can be used widely in optical communication and integrated optics field.In the optical communication, the Internet that develops rapidly and data communication technology have caused the research interest to the broadband light orthoron.In wavelength-division multiplex system, (this mutual effect may betide between the signal of multichannel system for the nonlinear interaction of four wave mixing and the influence of peak gain, can produce frequency tripling and different kinds of parameters effects such as frequency, difference frequency), seriously limited and can transmit the quantity that can accept signal to noise ratio and signal to noise ratio variation channel.In order to overcome above-mentioned shortcoming, use the array optical waveguides amplifier that a plurality of wavelength are amplified (channel amplifies a wavelength), be a good method.Array type optical waveguide amplifier be owing to can amplify multipath light signal simultaneously, and have miniaturization, integrated, be suitable for advantage such as batch process, be subjected to researcher's extensive concern in recent years.
The selection of pump mode and the gain of image intensifer have important relation.For orthoron, pump mode commonly used has end pumping and profile pump.End pumping can be subdivided into end face forward pumping, end face backward pumping and three kinds of modes of end face two directional pump again.Forward pumping refers to the pump light of input and the same end that input signal light is added in waveguide, along identical path co-propagate.Backward pumping refers to the two ends that input pumping light and flashlight are added in waveguide respectively, propagates along opposite direction.Two directional pump refers to and adds pump light at the two ends of waveguide simultaneously, under the identical situation of pumping source power total pump power is doubled like this, thereby improves Amplifier Gain.The coupling efficiency of end pumping mode is higher, demonstrates remarkable advantages in the amplifier of middle low gain is used.
And for array type optical waveguide amplifier, obtain higher gain, adopting the mode of end pumping is to meet the requirements of.So can only select other pump mode effectively to improve gain.
Summary of the invention
The present invention adopts array semiconductor laser diode Bar bar to carry out profile pump, pump light just can carry out pumping in the entire path of waveguide surface transmission like this, the waveguide of average unit length obtains pump energy will be far above the end pumping mode, thereby obtains bigger gain.
1. pump mode
The pumping source of optical waveguides amplifier is normally selected the quasi-continuous smooth output semiconductor laser diode of specific wavelength, fixed-bandwidth for use.But consider that the power of single diode and energy are limited, and, must increase pump power or energy, so need to use a plurality of semiconductor lasers to carry out pumping simultaneously in order further to improve amplifier gain.Because the mode of end pumping is the requirement that can't reach high-gain.Thereby adopt the profile pump mode, as pumping source, just can solve the low and low defective of single semiconductor laser diode power of end pumping efficient with the linear array semiconductor laser diode.
2. part
As shown in Figure 1, a semiconductor laser diode array 3 constitutes a Bar bar, places the active area 1 of optical waveguides amplifier, adopts the mode of profile pump that a fiber waveguide is carried out profile pump.The Bar bar of certain-length can reach higher total peak power.Adopt this pump mode can make the array type waveguide amplifier obtain bigger gain.As shown in Figure 2,3 pairs of four waveguide fiber waveguides of four semiconductor laser diode arrays are carried out the lateral vertical pumping, constitute the four-way orthoron.
3. the coupled modes of pumping source
In order to improve the pumping source energy utilization efficiency, directly use cylindrical lens to be coupled at diode array and wave guide zone.As shown in Figure 3, the pump light that sends of semiconductor laser diode array 3 converges at optical waveguides amplifier active area 1 by cylindrical lens 4.Improve the utilance of pumping source, thereby increased the pump energy of optical waveguides amplifier gain media.As shown in Figure 4, be four cylindrical lenses to four array diodes schematic cross-section that is coupled.Thereby the energy of each pumping source is fully used.
4. array type waveguide amplifier pumping source is integrated
As shown in Figure 5, the single channel waveguide amplifier is by semiconductor laser diode array 3; Reserve coupling optical waveguide 2; Input optical fibre 9; Output optical fibre 10; V-type groove 8; Input optical signal 6; Light signal 7 after the amplification; Glass substrate 5 grades are partly formed.Input optical signal 6 by the lateral vertical pumping of semiconductor laser diode array 3, has been realized the amplification of light signal, the light signal 7 after obtaining at last amplifying in the waveguide gain media.
Four-way array type optical waveguide amplifier structure owing to adopted four array laser diode bar bars to carry out profile pump, has improved pump power and pumping efficiency as shown in Figure 6 greatly.Realize the amplification of four-way light signal.Consider that will to make eight waveguide difficulty on a chip simultaneously very big, therefore, in order to reduce the manufacture craft difficulty, on a chip, only design four waveguides, be contained on the glass substrate 11 that is used for fixing with two chipsets then, form one eight channel amplifier, as shown in Figure 7.
Characteristic of the present invention: on the basis of the amplification principle of optical waveguides amplifier and pump mode, change and designed the optical waveguides amplifier pump mode in the past, adopt the linear array semiconductor laser diode as pumping source in the waveguide amplification region, adopt the profile pump mode simultaneously, improved the effective absorptivity of waveguide amplification region greatly, thereby improved the array type waveguide Amplifier Gain pump light.Adopt cylindrical lens to come coupling diode array and wave guide zone, improved the capacity usage ratio of waveguide amplification region unit length greatly.
Innovative point of the present invention: (1) each bar orthoron adopts a laser diode bar bar to carry out profile pump, has improved the pump power and the pumping efficiency of average unit length waveguide; (2) the array type waveguide amplifier adopts array laser diode bar bar to carry out profile pump, has formed integrated array type waveguide amplifier system; (3) pumping source adopts the cylindrical lens coupled modes, has improved the pump energy utilance.
Using value of the present invention: array laser diode Bar bar profile pump mode has obvious unique advantage and running performance for array type optical waveguide amplifier.This pump mode can be widely used in the array integrated optical device.
Description of drawings
Fig. 1 diode array carries out pumping scheme to a fiber waveguide, and wherein, 1 is the optical waveguides amplifier active area, and 2 for reserving coupling optical waveguide, and 3 is semiconductor laser diode array.
The vertical pumping four-way of Fig. 2 linear array diode array side orthoron schematic diagram, wherein, 1 is the optical waveguides amplifier active area, and 2 for reserving coupling optical waveguide, and 3 is semiconductor laser diode array.
Fig. 3 cylindrical lens is to the array diode schematic cross-section that is coupled, and wherein, 1 is the optical waveguides amplifier active area, and 3 is semiconductor laser diode array, and 4 is cylindrical lens, and 5 is waveguide chip.
Four cylindrical lenses of Fig. 4 are to four array diodes schematic cross-section that is coupled, and wherein, 1 is the optical waveguides amplifier active area, and 3 is semiconductor laser diode array, and 4 is cylindrical lens, and 5 is waveguide chip.
Fig. 5 single channel profile pump orthoron structural representation, wherein, 2 for reserving coupling optical waveguide, and 3 is semiconductor laser diode array, 5 is glass substrate, and 6 is input optical signal, and 7 are the light signal after amplifying, 8 is the V-type groove, and 9 is input optical fibre, and 10 is output optical fibre.
Fig. 6 four-way array type waveguide amplifier architecture schematic diagram, wherein, 2 for reserving coupling optical waveguide, and 3 is semiconductor laser diode array, 5 is glass substrate, and 6 is input optical signal, and 7 are the light signal after amplifying, 8 is the V-type groove, and 9 is input optical fibre, and 10 is output optical fibre.
Fig. 7 is assembled into the structural representation of eight channel waveguide amplifiers with two four-way waveguide chips, wherein, 2 for reserving coupling optical waveguide, and 3 is semiconductor laser diode array, and 5 is glass substrate, 6 is input optical signal, 7 are the light signal after amplifying, and 8 is the V-type groove, and 9 is input optical fibre, 10 is output optical fibre, and 11 are the fixing substrate glass of usefulness.
Claims (4)
1, the pump mode of array type optical waveguide amplifier, comprise semiconductor laser diode array (3) and cylindrical lens (4), described array optical waveguides amplifier is mainly to utilize semiconductor laser diode array (3) to utilize the profile pump mode that the input optical signal in the fiber waveguide is amplified by cylindrical lens (4), it is characterized in that described array type optical waveguide amplifier is made up of semiconductor laser diode array (3), cylindrical lens (4) array and fiber waveguide permutation (1).
2, the pump mode of array type optical waveguide amplifier according to claim 1, it is characterized in that, described single-chip array optical waveguides amplifier can be made the strip optical waveguide with four input/output ports, has four sections straight wave guides (1) as the optical waveguides amplifier active area.
3, according to the pump mode of claim 1,2 described array type optical waveguide amplifiers, it is characterized in that pump light to the four section fiber waveguide permutation (1) that the top of four sections optical waveguides amplifier active areas has four cylindrical lenses arranged side by side (4), four semiconductor laser diode arrays arranged side by side of coupling (3) to send.
4, the pump mode of array type optical waveguide amplifier according to claim 3 is characterized in that, two chip of light waveguide (5) is assembled on the glass substrate (11) that is used for fixing, and constitutes one eight channel amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100594174A CN101562308A (en) | 2009-05-26 | 2009-05-26 | Pumping mode for array type optical waveguide amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100594174A CN101562308A (en) | 2009-05-26 | 2009-05-26 | Pumping mode for array type optical waveguide amplifier |
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| Publication Number | Publication Date |
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| CN101562308A true CN101562308A (en) | 2009-10-21 |
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| CNA2009100594174A Pending CN101562308A (en) | 2009-05-26 | 2009-05-26 | Pumping mode for array type optical waveguide amplifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022875A (en) * | 2013-01-05 | 2013-04-03 | 南京邮电大学 | Double-side pump device for large-mode-field square clad optical fibers |
| CN103022874A (en) * | 2012-12-27 | 2013-04-03 | 南京邮电大学 | Pump device for D-type clad fiber side in large mode field |
| CN115064930A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber laser based on cascade pumping |
-
2009
- 2009-05-26 CN CNA2009100594174A patent/CN101562308A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022874A (en) * | 2012-12-27 | 2013-04-03 | 南京邮电大学 | Pump device for D-type clad fiber side in large mode field |
| CN103022874B (en) * | 2012-12-27 | 2015-05-20 | 南京邮电大学 | Pump device for D-type clad fiber side in large mode field |
| CN103022875A (en) * | 2013-01-05 | 2013-04-03 | 南京邮电大学 | Double-side pump device for large-mode-field square clad optical fibers |
| CN115064930A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber laser based on cascade pumping |
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Open date: 20091021 |