CN-115066815-B - Laser device

Abstract

The laser device includes, for example, a gain section, a first reflection section, a second reflection section provided on the opposite side of the first reflection section from the gain section, a distributor provided on the opposite side of the gain section from the first reflection section and distributing the laser light from the first reflection section into first light and second light, a first end section arranged so as to be separated from the distributor in a first direction and outputting the first light as output light, and a second end section arranged so as to be separated from the distributor in a second direction different from the first direction from the distributor and outputting the second light.

Inventors

• Yuki isobe
• KIYOTA KAZUAKI

Assignees

• 古河电气工业株式会社

Dates

Publication Date

20260512

Application Date

20210210

Priority Date

20200212

Claims (7)

1. 1. A laser device is provided with: A gain section; A first reflection section; A second reflection unit provided on the opposite side of the first reflection unit from the gain unit; A distributor which is provided on the opposite side of the gain section from the first reflection section and distributes the laser light from the first reflection section into first light and second light; A first end portion which is disposed so as to be separated from the distributor in a first direction and which is located on the opposite side of the first reflecting portion from the distributor and outputs the first light or the amplified first light as outgoing light, and A second end portion which is disposed apart from the dispenser in a second direction different from the first direction with respect to the dispenser and outputs the second light as detection light, In the dispenser, the output ratio of the first light with respect to the laser light from the first reflecting portion is 80% or more and 99% or less, Only a waveguide is interposed between the splitter and the second end, the waveguide propagating the second light without amplification, The first end part and the second end part are respectively positioned at one end and the other end of the laser device in the length direction, Light that is not optically coupled to the waveguides of the first light and the second light in the splitter becomes stray light, The direction in which the first end portion exists with respect to the dispenser and the direction in which the second end portion exists with respect to the dispenser are different from each other, thereby suppressing the stray light from being mixed into the second light output from the second end portion, The waveguide of the second light has a curved portion, In the curved portion, the traveling direction of the second light is changed by approximately 180 degrees, The output light from the second end portion is weaker than the output light from the first end portion, and the stray light travels in the light input direction from the first reflection portion to the dispenser.
2. 2. The laser device according to claim 1, wherein, The second reflecting portion is a ring resonator filter.
3. 3. The laser device according to claim 1, wherein, The second reflecting part is a reflecting mirror.
4. 4. The laser device according to claim 3, wherein, The reflecting mirror is of a DBR type.
5. 5. The laser device according to claim 1, wherein, An optical amplifier is provided between the first reflecting portion and the first end portion.
6. 6. The laser device according to claim 5, wherein, The optical amplifier is located between the splitter and the first end.
7. 7. The laser device according to claim 5, wherein, The optical amplifier is located between the first reflecting portion and the dispenser.

Description

Laser device Technical Field The present invention relates to a laser device. Background Conventionally, a laser device is known which includes a first reflecting portion, a second reflecting portion, and a gain portion between the first reflecting portion and the second reflecting portion, and emits laser light from an emission end (tip) on the opposite side of the second reflecting portion and the gain portion with respect to the first reflecting portion (for example, patent document 1). In such a laser device, for example, a measuring device such as a wavelength meter or a power meter is used to monitor the rear output light that is output from the end (rear end) on the opposite side of the transmission output end of the second reflecting section (patent document 1). Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2019-140308 Disclosure of Invention Problems to be solved by the invention However, in the above-described conventional laser device, if the reflectance of the second reflecting portion is increased in order to increase the power of the output light of the laser device, there is a problem that the power of the rear output light is reduced, and it becomes difficult to detect characteristics such as wavelength. Accordingly, one of the problems of the present invention is to obtain a laser device that can more easily detect characteristics such as the wavelength of laser light. Means for solving the problems The laser device includes, for example, a gain section, a first reflection section, a second reflection section provided on the opposite side of the first reflection section from the gain section, a distributor provided on the opposite side of the gain section from the first reflection section and distributing laser light from the first reflection section into first light and second light, a first end section provided separately from the distributor in a first direction and on the opposite side of the first reflection section from the distributor and outputting the first light or the amplified first light as output light, and a second end section provided separately from the distributor in a second direction different from the first direction from the distributor and outputting the second light. The laser device includes, for example, a waveguide having a curved portion and connecting the distributor and the second end portion. Further, in the laser device, for example, in the curved portion, the traveling direction of the second light is changed by approximately 180 °. In the laser device, for example, the first end portion and the second end portion are located at one end and the other end of the laser device in the longitudinal direction. In the laser device, for example, the second reflecting portion is a ring resonator filter. In the laser device, for example, the second reflecting portion is a mirror. In the laser device, the mirror is, for example, a DBR type. The laser device includes, for example, an optical amplifier between the first reflecting portion and the first end portion. Furthermore, in the laser device, for example, the optical amplifier is located between the dispenser and the first end portion. In the laser device, for example, the optical amplifier is located between the first reflecting portion and the dispenser. Effects of the invention According to the present invention, a laser device that can more easily detect characteristics such as the wavelength of laser light can be obtained. Drawings Fig. 1 is an exemplary and schematic top view of a laser device of an embodiment. Fig. 2 is an exemplary and schematic top view of the laser device of the first modification. Fig. 3 is an exemplary and schematic top view of a laser device of a second modification. Fig. 4 is an exemplary and schematic top view of a laser device of a third modification. Detailed Description In the following, exemplary embodiments and modifications of the present invention are disclosed. The configurations of the embodiments and modifications shown below, and the actions and results (effects) caused by the configurations are merely examples. The present invention can be realized by a structure other than the structure disclosed in the following embodiments and modifications. Further, according to the present invention, at least one of various effects (also including the effect of derivatization) obtained by the structure can be obtained. The following embodiments and modifications have the same configuration. Thus, according to the configurations of the embodiments and modifications, the same actions and effects can be obtained based on the same configuration. In addition, the same reference numerals are given to those same structures below, and duplicate explanation is sometimes omitted. In the present specification, ordinal numbers are given for convenience in distinguishing between components, parts, and the like, and do not denote a priority orde