CN109950785B - Wavelength tunable external cavity laser - Google Patents
Wavelength tunable external cavity laser Download PDFInfo
- Publication number
- CN109950785B CN109950785B CN201711397018.XA CN201711397018A CN109950785B CN 109950785 B CN109950785 B CN 109950785B CN 201711397018 A CN201711397018 A CN 201711397018A CN 109950785 B CN109950785 B CN 109950785B
- Authority
- CN
- China
- Prior art keywords
- face
- external cavity
- laser
- end surface
- cavity laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a wavelength tunable external cavity laser. The external cavity laser comprises a laser gain chip, a collimating lens, a tunable filter and a reflector which are sequentially arranged, wherein the laser gain chip is used for emitting light beams, the collimating lens is used for collimating the light beams into parallel light beams, the reflector comprises a third end face which is relatively close to the tunable filter and a fourth end face which is relatively far away from the tunable filter, the light beams emitted by the laser gain chip are sequentially emitted to the collimating lens, the tunable filter and the reflector, a partial reflection part transmission film is plated on the third end face, the third end face and one end face of the laser gain chip form two outer cavity faces of a resonant cavity, and the fourth end face is set to be an inclined face or a curved face with an included angle with the parallel light beams. The reflected light of the fourth end surface does not resonate in the resonant cavity, so that the influence on the external cavity mode is avoided.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to an external cavity laser with tunable wavelength.
Background
Among numerous tunable wavelength lasers, the external cavity laser structure has the significant advantages of narrow line width, large tuning range, high output power, high side mode suppression ratio and the like. The existing external cavity laser comprises a laser gain chip and a reflector, wherein the reflector comprises a front end face and a rear end face, the front end face is close to the laser gain chip compared with the rear end face, and a partial reflecting film is plated on the front end face; the resonant cavity of the external cavity laser is realized based on the F-P cavity plane reflection principle, one external cavity surface is one end surface of the laser gain chip plated with a reflection film, and the other external cavity surface is the front end surface of the reflector.
In practical application, part of the reflected light of the rear end face of the reflector returns to the resonant cavity to resonate, which affects the external cavity mode, so that the single mode finally output by the external cavity laser is distorted, and the output light power is reduced.
Disclosure of Invention
The invention aims to provide a wavelength tunable external cavity laser, which at least solves the problem that the reflected light on the rear end face of a reflector affects the external cavity mode.
To achieve the above objects, an embodiment of the present invention provides a wavelength tunable external cavity laser, the external cavity laser comprises a laser gain chip, a collimating lens, a tunable filter and a reflector which are sequentially arranged, the laser gain chip is used for emitting light beams, the collimating lens is used for collimating the light beams into parallel light beams, the mirror includes a third end face relatively close to the tunable filter and a fourth end face relatively far from the tunable filter, the light beam emitted by the laser gain chip is emitted to the collimating lens, the tunable filter and the reflector in sequence, and the third end surface is plated with a partial reflection partial transmission film, the third end surface and one end surface of the laser gain chip form two outer cavity surfaces of the resonant cavity, and the fourth end surface is an inclined surface or a curved surface which forms an included angle with the parallel light beams.
In a further embodiment of the present invention, the third end surface of the reflecting mirror is a plane perpendicular to the parallel light beam, and the fourth end surface of the reflecting mirror is an inclined surface having an included angle with the parallel light beam.
In a further embodiment of the invention, the angle alpha of the angle satisfies 0 DEG < alpha.ltoreq.86 deg.
In a further embodiment of the present invention, the external cavity laser further comprises an auxiliary lens disposed at a fourth end face side of the mirror, the auxiliary lens being configured to: and the light beam transmitted out of the reflector from the fourth end surface is recovered to be transmitted in parallel in the same direction as the parallel light beam by the auxiliary lens after being transmitted out of the auxiliary lens.
In a further embodiment of the invention, the auxiliary lens comprises a fifth end surface relatively close to the mirror and a sixth end surface relatively far from the mirror; the sixth end surface is parallel to the third end surface, and the fifth end surface is parallel to the fourth end surface.
In a further embodiment of the present invention, the external cavity laser further includes an isolator disposed between the auxiliary lens and the mirror, so that the light beam transmitted from the fourth end surface out of the mirror sequentially exits to the isolator and the auxiliary lens.
In a further embodiment of the present invention, the reflector is configured as a plano-convex lens, the third end surface is a plane perpendicular to the parallel light beams, and the fourth end surface is configured as a convex transparent surface.
In a further embodiment of the present invention, the focal point of the reflecting mirror falls on the light-emitting end face of the external cavity laser; the external cavity laser also comprises an isolator, and the light beam transmitted out of the reflector from the fourth end surface is emitted to the light-emitting end surface of the external cavity laser after passing through the isolator.
In a further embodiment of the present invention, the laser gain chip includes a first end surface relatively far from the collimating lens and a second end surface relatively close to the collimating lens, and the first end surface constitutes an outer cavity surface of the resonant cavity.
In a further embodiment of the present invention, the first end surface is plated with a total reflection film, and the external cavity laser further includes a backlight detection chip disposed in the resonant cavity.
Compared with the prior art, the invention has the beneficial effects that: the reflected light of the fourth end face is no longer parallel to the parallel light beams, and no matter whether the reflected light returns to the resonant cavity, the reflected light cannot resonate, so that the influence on an external cavity mode is avoided, the single mode finally output by the external cavity laser is prevented from being distorted, and the output light power is ensured.
Drawings
Fig. 1 is a structural perspective view of a wavelength tunable external cavity laser of embodiment 1 of the present invention;
fig. 2 is a top view of the structure of a wavelength tunable external cavity laser of embodiment 1 of the present invention;
fig. 3 is a front view of the structure of a wavelength tunable external cavity laser of embodiment 1 of the present invention;
fig. 4 is a structural perspective view of a wavelength tunable external cavity laser of embodiment 2 of the present invention;
fig. 5 is a top view of the structure of a wavelength tunable external cavity laser of embodiment 2 of the present invention;
fig. 6 is a front view of the structure of a wavelength tunable external cavity laser of embodiment 2 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
Example 1
Referring to fig. 1 to 3, an embodiment of the present invention provides a wavelength tunable external cavity laser 100, where the external cavity laser 100 includes a laser gain chip 11, a collimating lens 12, a tunable filter 13, and a reflecting mirror 14, which are sequentially arranged on an optical path of a light beam.
To clearly express the positions and directions described in the present application, referring to fig. 1, the direction along the optical path of the light beam toward the laser gain chip 11 toward the mirror 14 is defined as "rear", whereas the direction toward the laser gain chip 11 from the mirror 14 is defined as "front". Correspondingly, the laser gain chip 11, the collimating lens 12, the tunable filter 13 and the reflector 14 are arranged in sequence from front to back.
The laser gain chip 11 is used to emit a diverging beam and can gain-amplify the diverging beam. The light beam emitted by the laser gain chip 11 is emitted to the collimating lens 12, the tunable filter 13 and the reflector 14 in sequence. The laser gain chip 11 includes a first end face 11a and a second end face 11b, wherein: the first end surface 11a is relatively far away from the collimating lens 12, and the second end surface 11b is relatively close to the collimating lens 12, that is, the first end surface 11a is located in front of the second end surface 11b, and the first end surface 11a and the second end surface 11b respectively form a front end surface and a rear end surface of the laser gain chip 11.
The second end face 11b is plated with an antireflection film, and the second end face 11b forms an output end of the laser gain chip 11; the first end face 11a is coated with a total reflection film which constitutes one outer cavity face of the resonant cavity of the external cavity laser 100.
The collimating lens 12 is located on the second end face 11b side of the laser gain chip 11, that is, on the output end side of the laser gain chip 11, and is configured to collimate the divergent light beam emitted from the second end face 11b of the laser gain chip 11 into a parallel light beam, where the parallel light beam is parallel to the optical axis of the external cavity laser 100.
The tunable filter 13 is used to lock the output frequency of the external cavity laser 100, i.e., to transmit and filter the light beam (e.g., the parallel light beam) to allow light of a particular range of wavelengths to be transmitted and to filter light of other ranges of wavelengths. In this embodiment, the tunable filter 13 is specifically configured as a vernier tuning mechanism, which includes an etalon 131, an etalon 132, and an etalon 133 arranged at intervals.
The mirror 14 comprises a third end face 14a and a fourth end face 14b, wherein: the third end face 14a is relatively close to the tunable filter 13, and the fourth end face 14b is relatively far from the tunable filter 13, that is, the third end face 14a is located in front of the fourth end face 14b, and the third end face 14a and the fourth end face 14b respectively form a front end face and a rear end face of the mirror 14.
The third end surface 14a is coated with a partially reflective and partially transmissive film, and specifically, may be coated with a 30% reflective and 70% transmissive film. Thus, the parallel light beam incident on the third end face 14a from the tunable filter 13 is partially reflected by the third end face 14a forward to the tunable filter 13, and partially transmitted from the third end face 14a backward into the mirror 14. That is, a resonant cavity of the external cavity laser 100 is formed between the first end surface 11a of the laser gain chip 11 and the third end surface 14a of the mirror 14, wherein the first end surface 11a and the third end surface 14a respectively form two external cavity surfaces of the resonant cavity. Therefore, the third end face 14a forms an external cavity surface of the resonant cavity, and the third end face 14a also forms a light outlet end of the resonant cavity, so that only one-time coupling is needed behind the third end face 14a, the coupling difficulty is small, the coupling tolerance is high, the structure is compact, and the process is simple.
The fourth end surface 14b is arranged as an inclined surface having an angle with said parallel light beam. Thus, the parallel light beam transmitted into the mirror 14 from the third end face 14a is partially transmitted back out of the mirror 14 from the fourth end face 14b to finally form the outgoing light of the resonator, and is partially reflected forward by the fourth end face 14 b; however, since the fourth end face 14b is obliquely arranged, the part of the light beam reflected forward by the fourth end face 14b is no longer parallel to the parallel light beam, and no matter whether the part of the light beam returns to the resonant cavity, resonance cannot be performed, so that the influence of the part of the light beam on the external cavity mode is avoided, distortion of a single mode finally output by the external cavity laser 100 is prevented, and output optical power is ensured.
In this embodiment, the mirror 14 is provided as a wedge-shaped structure. Specifically, the third end face 14a is a plane perpendicular to the parallel light beam, and the fourth end face 14b is an inclined plane having a constant included angle with the parallel light beam, wherein the included angle α satisfies 0 ° < α ≦ 86 °. That is, the fourth end surface 14b and the third end surface 14a have an inclined included angle of 4 ° or more and less than 90 °.
Further, the external cavity laser 100 further includes an isolator 15 and a coupling lens 17 disposed behind the reflector 14 and sequentially disposed on the light path of the light beam, and the light beam transmitted from the fourth end face 14b passes through the isolator 15 and then is coupled to the light-emitting end face of the external cavity laser 100 through the coupling lens 17, thereby completing the light-emitting coupling of the external cavity laser 100. By providing the isolator 15, the beam in the fiber link can be prevented from being incident forward into the cavity of the external cavity laser 100 and affecting the external cavity mode. In the present embodiment, the external cavity laser 100 is coupled to the optical fiber adapter 18, and accordingly, the light-emitting end surface of the external cavity laser 100 is formed on the optical fiber end surface of the optical fiber adapter 18.
Further, the external cavity laser 100 further includes an auxiliary lens 16 for correcting the transmission direction of the light beam, and the auxiliary lens 16 is specifically disposed on the fourth end face 14b side of the reflecting mirror 14, that is, on the rear light path of the reflecting mirror 14. After the light beam is transmitted out of the mirror 14 from the fourth end face 14b, the propagation direction of the light beam is deflected with respect to the propagation direction of the parallel light beam, and the auxiliary lens 16 is configured to: the light beam transmitted from the fourth end face 14b through the reflector 14 is recovered by the auxiliary lens 16 to be transmitted in parallel in the same direction as the parallel light beam after being transmitted through the auxiliary lens 16, so that the light path is coaxial, and the structure is compact.
Specifically, the auxiliary lens 16 includes a fifth end face 16a and a sixth end face 16b, wherein: the fifth end surface 16a is relatively close to the reflector 14, and the sixth end surface 16b is relatively far from the reflector 14, that is, the fifth end surface 16a is located in front of the sixth end surface 16b, and the fifth end surface 16a and the sixth end surface 16b respectively form the front end surface and the rear end surface of the auxiliary lens 16.
The auxiliary lens 16 is provided in a wedge-shaped configuration similar to the mirror 14. The fifth end face 16a is parallel to the fourth end face 14b and is an inclined plane with a constant included angle with the parallel light beams, wherein the included angle alpha is more than 0 degree and less than or equal to 86 degrees; the sixth end face 16b is parallel to the third end face 14a, which is a plane perpendicular to the parallel light beams, that is, the fifth end face 16a and the sixth end face 16b have an inclined included angle of 4 ° or more and less than 90 °.
In this embodiment, the isolator 15 is disposed between the auxiliary lens 16 and the mirror 14, so that the light beam transmitted from the fourth end face 14b through the mirror 14 sequentially exits to the isolator 15 and the auxiliary lens 16, thereby not only ensuring that the optical path is coaxial, but also further ensuring that the light beam in the optical fiber link is forward incident into the resonant cavity of the external cavity laser 100 to affect the external cavity mode.
In this embodiment, the external cavity laser 100 further includes a backlight detection chip (not shown) disposed in the resonant cavity and used for monitoring the light extraction efficiency of the external cavity laser 100.
Further, in the present embodiment, external cavity laser 100 further includes a base 191 and a semiconductor refrigerator 19. One or more of the laser gain chip 11, the collimating lens 12, the backlight detection chip and the like are arranged on the base 191; base 191 is made of a thermally conductive material and is disposed on semiconductor cooler 19. Semiconductor cooler 19 may be used to regulate the temperature so that one or more of laser gain chip 11, collimating lens 12, the backlight detector chip, etc. operate at a desired temperature.
Compared with the prior art, the external cavity laser 100 of the present embodiment has the following beneficial effects: the reflected light of the fourth end face 14b does not resonate in the resonant cavity, so that the influence on the external cavity mode is avoided, the single mode finally output by the external cavity laser 100 is prevented from being distorted, and the output optical power is ensured; by arranging the isolator 15, the influence of the forward incidence of the light beam in the optical fiber link into the resonant cavity on the external cavity mode is avoided; by arranging the lens 16, the coaxiality of light paths is ensured, and the compact structure is realized; the third end face 14a forms an outer cavity face of the resonant cavity, and also forms a light outlet end of the resonant cavity, and only one-time coupling needs to be performed behind the third end face 14a, so that the coupling difficulty is small, the coupling tolerance is high, the structure is compact, and the process is simple.
Example 2
Referring to fig. 4 to 6, an embodiment of the present invention provides a wavelength tunable external cavity laser 200, where the external cavity laser 200 includes a laser gain chip 21, a collimating lens 22, a tunable filter 23, and a reflecting mirror 24, which are sequentially arranged on an optical path of a light beam.
To clearly express the positions and directions described in the present application, referring to fig. 4, the direction along the optical path of the light beam directed by the laser gain chip 21 toward the mirror 24 is defined as "rear", whereas the direction directed by the mirror 24 toward the laser gain chip 21 is defined as "front". Correspondingly, the laser gain chip 21, the collimating lens 22, the tunable filter 23, and the reflector 24 are arranged in sequence from front to back.
The laser gain chip 21 is used to emit a diverging beam and may gain-amplify the diverging beam. The light beam emitted by the laser gain chip 21 is emitted to the collimating lens 22, the tunable filter 23 and the reflector 24 in sequence. The laser gain chip 21 includes a first end face 21a and a second end face 21b, wherein: the first end face 21a is relatively far away from the collimating lens 22, and the second end face 21b is relatively close to the collimating lens 22, that is, the first end face 21a is located in front of the second end face 21b, and the first end face 21a and the second end face 21b respectively form a front end face and a rear end face of the laser gain chip 21.
The second end face 21b is plated with an antireflection film, and the second end face 21b forms an output end of the laser gain chip 21; the first end face 21a is coated with a total reflection film which constitutes one outer cavity face of the resonant cavity of the external cavity laser 200.
The collimating lens 22 is located on the second end face 21b side of the laser gain chip 21, i.e. on the output end side of the laser gain chip 21, and is configured to collimate the diverging light beam emitted from the second end face 21b of the laser gain chip 21 into a parallel light beam, where the parallel light beam is parallel to the optical axis of the external cavity laser 200.
The tunable filter 23 is used to lock the output frequency of the external cavity laser 200, i.e., to transmit and filter the light beam (e.g., the parallel light beam) to allow light of a particular range of wavelengths to be transmitted and to filter light of other ranges of wavelengths. In this embodiment, the tunable filter 23 is specifically configured as a vernier tuning mechanism, which includes an etalon 231, an etalon 232, and an etalon 233 arranged at intervals.
The mirror 24 comprises a third end face 24a and a fourth end face 24b, wherein: the third end surface 24a is relatively close to the tunable filter 23, and the fourth end surface 24b is relatively far from the tunable filter 23, that is, the third end surface 24a is located in front of the fourth end surface 24b, and the third end surface 24a and the fourth end surface 24b respectively form a front end surface and a rear end surface of the mirror 24.
In the present embodiment, the third end surface 24a is coated with a partially reflective and partially transmissive film, and specifically, may be coated with a 30% reflective and 70% transmissive film. Thus, the parallel light beam incident on the third end surface 24a from the tunable filter 23 is partially reflected by the third end surface 24a forward to the tunable filter 23, and partially transmitted from the third end surface 24a backward into the mirror 24. That is, a resonant cavity of the external cavity laser 200 is formed between the first end surface 21a of the laser gain chip 21 and the third end surface 24a of the mirror 24, wherein the first end surface 21a and the third end surface 24a respectively form two external cavity surfaces of the resonant cavity. Therefore, the third end surface 24a forms an external cavity surface of the resonant cavity, and the third end surface 24a also forms a light outlet end of the resonant cavity, so that only one-time coupling is needed behind the third end surface 24a, the coupling difficulty is small, the coupling tolerance is high, the structure is compact, and the process is simple.
The fourth end surface 24b is arranged as a curved surface having a non-constant angle with said parallel light beam. Thus, the parallel light beam transmitted into the mirror 24 from the third end face 24a is partially transmitted back out of the mirror 24 from the fourth end face 24b to finally form the outgoing light of the resonator, and is partially reflected forward by the fourth end face 24 b; however, since the fourth end surface 24b is a curved surface, the part of the light beam reflected forward by the fourth end surface 24b is no longer parallel to the parallel light beam, and cannot resonate whether returning to the resonant cavity or not, so that the influence of the part of the light beam on the external cavity mode is avoided, the distortion of the single mode finally output by the external cavity laser 200 is prevented, and the output optical power is ensured.
In the present embodiment, the reflecting mirror 24 is configured as a plano-convex lens, and may be a C-lens, the third end surface 24a is a plane perpendicular to the parallel light beams, and the fourth end surface 24b is configured as an arc-shaped convex transparent surface protruding backward. Thus, the optical path can be further ensured to be coaxial, and the structure is compact.
Further, the external cavity laser 200 further includes an isolator 25 disposed on the optical path behind the reflector 24, and the light beam transmitted by the fourth end surface 24b is coupled to the light-emitting end surface of the external cavity laser 200 after passing through the isolator 25, thereby completing the light-emitting coupling of the external cavity laser 200. In this way, by providing the isolator 25, the beam in the fiber link is prevented from being incident forward into the cavity of the external cavity laser 200 and affecting the external cavity mode.
Further, the fourth end face 24b of the mirror 24 is provided to protrude toward the isolator 25, and the focal point of the mirror 24 falls on the light exit end face of the external cavity laser 200. Thus, the light beam is transmitted out of the fourth end surface 24b of the reflector 24 and then focused on the light-emitting end surface of the external cavity laser 200, thereby completing the light-emitting coupling of the external cavity laser 200; the third end surface 24a of the reflector 24 constitutes an outer cavity surface of the resonant cavity, and the reflector 24 plays a role in coupling light beams, so that the compactness of the structure is greatly improved, and the packaging size of the external cavity laser 200 is further miniaturized.
In the present embodiment, the external cavity laser 200 is coupled to the optical fiber adapter 28, and accordingly, the light-emitting end surface of the external cavity laser 200 is formed on the optical fiber end surface of the optical fiber adapter 28.
In this embodiment, the external cavity laser 200 further includes a backlight detection chip (not shown) disposed in the resonant cavity and used for monitoring the light extraction efficiency of the external cavity laser 200.
Further, the external cavity laser 200 further includes a mount 291 and a semiconductor refrigerator 29. One or more of the laser gain chip 21, the collimating lens 22, the backlight detection chip and the like are arranged on the base 291; the base 291 is made of a heat conductive material and is disposed on the semiconductor cooler 29. The semiconductor cooler 29 can be used to regulate the temperature so that one or more of the laser gain chip 21, the collimating lens 22, the backlight detection chip, etc. can operate under the required temperature condition.
Compared with the prior art, the external cavity laser 200 of the present embodiment has the following beneficial effects: by arranging the reflector 24 and the specific structure thereof, on one hand, the reflected light of the fourth end surface 24b does not resonate in the resonant cavity, thereby avoiding the influence on the external cavity mode, preventing the single mode finally output by the external cavity laser 200 from being distorted, and ensuring the output optical power, on the other hand, the third end surface 24a of the reflector 24 not only forms the external cavity surface of the resonant cavity, but also forms the light output end of the resonant cavity, and only needs to couple once behind the third end surface 24a, so that the coupling difficulty is small, the coupling tolerance is high, the structure is compact, the process is simple, on the other hand, the reflector 24 also simultaneously plays a role in coupling light beams, the coaxiality of light paths is ensured, the compactness of the structure is greatly improved, and the packaging size of the external cavity laser 200 is further miniaturized; in addition, by arranging the isolator 25, the light beam in the optical fiber link is prevented from being forwardly incident into the resonant cavity to influence the external cavity mode.
It should be understood that although the specification has been described in terms of embodiments, not every embodiment includes only a single embodiment, which is for clarity, and the specification as a whole should be read as an example, and the embodiments can be combined as appropriate to form other embodiments as would be understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. An external cavity laser with tunable wavelength comprises a laser gain chip, a collimating lens, a tunable filter and a reflector which are sequentially arranged, the laser gain chip is used for emitting light beams, the collimating lens is used for collimating the light beams into parallel light beams, the mirror includes a third end face relatively close to the tunable filter and a fourth end face relatively far from the tunable filter, the light beam emitted by the laser gain chip is emitted to the collimating lens, the tunable filter and the reflector in sequence, characterized in that the third end face is a plane perpendicular to the parallel light beams and is plated with a partially reflective and partially transmissive film, the third end face and one end face of the laser gain chip form two outer cavity faces of the resonant cavity, and the fourth end face is a curved surface or an inclined surface with an included angle with the parallel light beams.
2. A wavelength tunable external cavity laser as claimed in claim 1, wherein the fourth end face of the mirror is arranged as an inclined plane having an angle with the parallel light beam.
3. The wavelength tunable external cavity laser of claim 2, wherein the angle α of said included angle satisfies 0 ° < α ≦ 86 °.
4. The wavelength tunable external cavity laser of claim 2, further comprising an auxiliary lens disposed on the fourth facet side of the mirror, the auxiliary lens configured to: and the light beam transmitted out of the reflector from the fourth end surface is recovered to be transmitted in parallel in the same direction as the parallel light beam by the auxiliary lens after being transmitted out of the auxiliary lens.
5. The wavelength tunable external cavity laser of claim 4, wherein said auxiliary lens includes a fifth facet relatively close to said mirror and a sixth facet relatively far from said mirror; the sixth end surface is parallel to the third end surface, and the fifth end surface is parallel to the fourth end surface.
6. The wavelength tunable external cavity laser of claim 4, further comprising an isolator disposed between the auxiliary lens and the mirror, such that the light beam transmitted from the fourth end face out of the mirror sequentially exits to the isolator and the auxiliary lens.
7. A wavelength tunable external cavity laser as claimed in claim 1 wherein said mirror is configured as a plano-convex lens and said fourth facet is configured as a convex transmission facet.
8. The wavelength tunable external cavity laser of claim 7, wherein the focal point of the mirror falls on the light exit facet of the external cavity laser; the external cavity laser also comprises an isolator, and the light beam transmitted out of the reflector from the fourth end surface is emitted to the light-emitting end surface of the external cavity laser after passing through the isolator.
9. The wavelength tunable external cavity laser of claim 1, wherein said laser gain chip includes a first end surface relatively remote from said collimating lens and a second end surface relatively close to said collimating lens, said first end surface constituting an outer cavity surface of said resonant cavity.
10. The wavelength tunable external cavity laser of claim 9, wherein said first facet is coated with a total reflection film, said external cavity laser further comprising a back-light detection chip disposed within said cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711397018.XA CN109950785B (en) | 2017-12-21 | 2017-12-21 | Wavelength tunable external cavity laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711397018.XA CN109950785B (en) | 2017-12-21 | 2017-12-21 | Wavelength tunable external cavity laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109950785A CN109950785A (en) | 2019-06-28 |
| CN109950785B true CN109950785B (en) | 2021-05-07 |
Family
ID=67005783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711397018.XA Active CN109950785B (en) | 2017-12-21 | 2017-12-21 | Wavelength tunable external cavity laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109950785B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116224570A (en) * | 2023-04-28 | 2023-06-06 | 中国科学院长春光学精密机械与物理研究所 | Tunable filter and semiconductor laser |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203787763U (en) * | 2014-04-16 | 2014-08-20 | 苏州旭创科技有限公司 | External cavity laser device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7415049B2 (en) * | 2005-03-28 | 2008-08-19 | Axsun Technologies, Inc. | Laser with tilted multi spatial mode resonator tuning element |
| JP2010050137A (en) * | 2008-08-19 | 2010-03-04 | Nec Corp | Optical module, optical communication device using the same and reflection optical path setting method |
| US20100322269A1 (en) * | 2009-06-17 | 2010-12-23 | Cogo Optronics, Inc. | Tunable laser |
| EP2770590A1 (en) * | 2013-02-22 | 2014-08-27 | EMCORE Corporation | Small packaged tunable laser assembly |
-
2017
- 2017-12-21 CN CN201711397018.XA patent/CN109950785B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203787763U (en) * | 2014-04-16 | 2014-08-20 | 苏州旭创科技有限公司 | External cavity laser device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109950785A (en) | 2019-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6208679B1 (en) | High-power multi-wavelength external cavity laser | |
| US6192062B1 (en) | Beam combining of diode laser array elements for high brightness and power | |
| US5050179A (en) | External cavity semiconductor laser | |
| US6327292B1 (en) | External cavity laser source using spectral beam combining in two dimensions | |
| JPH01502619A (en) | Optical wavelength division multiplexer | |
| US10746933B2 (en) | Fiber coupled laser source pump with wavelength division multiplexer, isolator, tap filter, and photodetector | |
| WO2020052515A1 (en) | Laser beam combining device with an unstable resonator cavity | |
| CA2329089C (en) | Fiber grating feedback stabilization of broad area laser diode | |
| US20030002548A1 (en) | Laser-diode assembly with external bragg grating for narrow-bandwidth light and a method of narrowing linewidth of the spectrum | |
| US7649680B2 (en) | Wavelength converting apparatus | |
| CN109950785B (en) | Wavelength tunable external cavity laser | |
| CN112928597A (en) | Semiconductor laser optical fiber coupling module | |
| JP2015056469A (en) | Diode laser module wavelength controlled by external resonator | |
| CN113644544A (en) | Wavelength locking semiconductor laser system | |
| US9935425B2 (en) | Fiber coupled laser source pump with wavelength division multiplexer | |
| US7936803B2 (en) | External cavity semiconductor laser | |
| CN114784623A (en) | High-brightness external cavity semiconductor laser | |
| CN112103768B (en) | Semiconductor laser | |
| US6600767B1 (en) | Free space laser with self-aligned fiber output | |
| CN115966995A (en) | Narrow linewidth external cavity laser device based on semi-confocal cavity | |
| KR102150701B1 (en) | Single-pacakge light source apparatus and laser apparatus comprsing the same | |
| CN112993747A (en) | Wavelength locking semiconductor laser system | |
| CN217639784U (en) | Beam splitting element and external cavity laser | |
| KR102328628B1 (en) | Wavelength stabilized laser module and its manufacturing method, Fiber laser using wavelength stabilized laser module | |
| CN215989629U (en) | Narrow linewidth external cavity laser device based on semi-confocal cavity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |