WO2015055644A1 - Halbleiterlaser mit einseitig verbreiterter ridgestruktur - Google Patents
Halbleiterlaser mit einseitig verbreiterter ridgestruktur Download PDFInfo
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- WO2015055644A1 WO2015055644A1 PCT/EP2014/072004 EP2014072004W WO2015055644A1 WO 2015055644 A1 WO2015055644 A1 WO 2015055644A1 EP 2014072004 W EP2014072004 W EP 2014072004W WO 2015055644 A1 WO2015055644 A1 WO 2015055644A1
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- Prior art keywords
- ridgestruktur
- end portion
- semiconductor laser
- width
- trench
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0201—Separation of the wafer into individual elements, e.g. by dicing, cleaving, etching or directly during growth
- H01S5/0202—Cleaving
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/1003—Waveguide having a modified shape along the axis, e.g. branched, curved, tapered, voids
- H01S5/1014—Tapered waveguide, e.g. spotsize converter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/028—Coatings ; Treatment of the laser facets, e.g. etching, passivation layers or reflecting layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/1003—Waveguide having a modified shape along the axis, e.g. branched, curved, tapered, voids
- H01S5/1017—Waveguide having a void for insertion of materials to change optical properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4031—Edge-emitting structures
Definitions
- the invention relates to a semiconductor laser having a
- the electromagnetic radiation is arranged.
- Ridgeregal is aligned along a longitudinal axis and has a smaller width than the main body and the active zone.
- the semiconductor lasers are manufactured in such a way that a plurality of semiconductor lasers are produced together on a base body. With help of a
- the fracture surface is arranged transversely to the longitudinal axis of the Ridge Design.
- Fracture surface i. the end face of the semiconductor laser in
- the object of the invention is to provide an improved semiconductor laser and an improved method for producing a semiconductor laser.
- the object of the invention is achieved by the semiconductor laser according to claim 1, by the method according to
- the Ridgepatented has an end portion and is widened on one side. Due to the one-sided widening through the end section, when breaking the fracture surface, fewer or no dislocations or transverse fractures occur in the region of the optical mode within the ridged structure. As a result of the widened end section of the ridged structure, when the fracture surface breaks, dislocations or transverse fractures are only formed laterally next to the ridged structure. As a result, the end face of the semiconductor laser is substantially formed as a flat fracture surface. In this way, the optical quality of the end surface is increased.
- the end faces are
- Electromagnetic radiation generated by the active zone barely or negligibly negatively affected.
- electromagnetic radiation which can be caused by a transverse offset in the region of the end surface, reduced or avoided.
- the trench is introduced into the surface by a mechanical scribe method, particularly with the aid of a diamond, or by a laser ablation method. This allows the trench to be made easily, quickly and with sufficient accuracy.
- the trench is introduced into the body by a chemical etching process. In this way, a precise shape and position of the trench can be made.
- one of the Ridge Scheme is the Ridge Scheme
- a width Y of the trench perpendicular to the end face 6 is less than 100 ⁇ m, in particular less than 50 ⁇ m, in particular less than 20 ⁇ m. This is sufficient guidance of the breaking edge at the same time rapid production of the trench
- a depth of the trench perpendicular to the surface of the main body is greater than 2 ym, in particular greater than 10 ym, in particular greater than a height of the Ridge Modell. With these values is one
- a length of the widened end section along a center axis of the ridged structure to the end face is less than 100 ⁇ m or preferably less than 50 ⁇ m and particularly preferably less than 20 ⁇ m. In this way, sufficient security for the leadership of the breaking edge is provided.
- the semiconductor laser on both end surfaces with respect to the longitudinal extent of a Ridge Design on one side arranged end portions. In this way, on both end surfaces the
- both end surfaces have a better quality for a reflection or decoupling of the guided electromagnetic radiation.
- the two end portions are arranged on a first longitudinal side of the Ridge Modell. On this way, both end faces can be broken from the same side.
- the end sections could also on
- a width is bl of the first
- the width of the ridged structure continuously increases from a normal width of the ridged structure to the second width of the end portion adjacent to the end surface. Due to the slow increase, the propagation of electromagnetic radiation is impaired as little as possible.
- radiation losses are attenuated by the end portion. This is accomplished by increasing the width of the end portion from the width of the ridged structure in at least one step, preferably at least two steps, to the second width of the end portion adjacent the end surface. Due to the gradual widening of the end portion a simple design of the end portion is possible.
- Contact layer is preferably formed along a center axis of the Ridge Vietnamese in the end portion. Depends on the In the selected embodiment, the contact layer may terminate in front of the end surface at a predetermined distance from the end surface on the ridge structure. In addition, when providing a
- Taper structure lateral areas of the tapered structure should not be covered with the contact layer. By reducing the area of the contact layer are electrical losses that do not contribute to the formation of the electromagnetic
- the Ridge designed opposite to the side of the one-sided end portion on a lateral recess, wherein the width of the
- the Ridge Design adjacent to the end portion arranged on one side on a Taper Design which is formed at least on one side with respect to a center axis of the Ridge Design.
- Taper structure represents a broadening of the ridge structure and reduces waveguide losses.
- Width of the end portion with increasing distance from the center of the Ridge Jardin be advantageous for the quality of electromagnetic radiation.
- two Ridge Schemeen are provided, which are arranged side by side and adjacent to a common end face having a common, widened end portion. In this way it is possible to use semiconductor lasers with several
- a limiting structure is on or in front of a widened end section
- Electromagnetic radiation can be provided by the provision of
- a base body is provided with an active zone and with a Ridge Design, wherein the Ridge Design along a longitudinal axis on the base body over the active zone is arranged, wherein the Ridge Design has a unilaterally arranged end portion and is widened on one side, wherein on a End portion opposite side of the Ridge Design a Bruchgraben adjacent to the end face and spaced from the Ridge gleich is arranged in a surface of the base body, wherein the breakage trench is a recess
- Ridge Designabites are broken in the region of the unilaterally arranged end portion, starting from the side of the trench and through the trench perpendicular to the longitudinal axis, so that two semiconductor lasers are obtained with a Ridge Design with a one-sided end portion according to claim 1.
- at least two Ridgepatenteden are arranged parallel to each other on the base body, each RidgeWORK having at least one end portion, each end portion is associated with a trench in the body on an opposite side of the Ridge Modell, the end portions and the trenches arranged on a straight line wherein four semiconductor lasers are obtained by breaking the main body along the straight line.
- Another aspect relates to a wafer with a
- Center axis of the Ridgeregal each have at least one end portion arranged on one side, so that the Ridge Cooken are widened on one side, wherein on a a ridge trench spaced from the Ridge gleich disposed in a surface of the base body, wherein the end portions and the associated trenches are arranged in a straight line the end portion opposite side of the Ridge Modellen.
- Fig. 1 is a schematic plan view of a
- Fig. 2 is a schematic front view of a
- FIG. 3 shows a plan view of a partial section of FIG. 2
- FIG. 4 shows an arrangement with several semiconductor lasers as part of a wafer
- FIG. 5 shows an enlarged view of a detail of the arrangement of FIG. 4 with an indication of the facet fracture direction
- FIG. 6 shows a schematic representation of an end section and a ridged structure
- Figures 12 to 17 further embodiments of a
- FIGS. 34 to 43 show end sections of a semiconductor laser with different forms of the electrical contact layer
- FIGS. 44 to 46 show parts of end portions of FIG
- Fig. 48 is a schematic plan view of another
- Fig. 49 is a schematic front view of a
- FIG. 50 shows a plan view of a partial section of FIG. 49
- FIG. 51 shows an arrangement with several further semiconductor lasers as part of a wafer
- FIG. 52 is an enlarged view of a detail of the arrangement of FIG. 51 indicating the facet breakage direction
- Fig. 53 shows a schematic representation of an end portion and a ridge structure.
- a basic idea of the invention is to eliminate faults in the facet, i. Disruptions of a planned end surface of
- Transverse facets are formed. The steps and eruptions worsen the adhesion of the facet to the
- the laser facet i. the end surface of the semiconductor laser, whereby e.g. the laser threshold and / or a laser slope negative
- transverse facets can increasingly occur in heavily strained semiconductor layers. This is the case, for example, with pseudomorphically braced indium- or aluminum-containing gallium nitride layers.
- the guide area is characterized by the width and longitudinal extent of the Ridge Design outside the
- Transverse facets arranged laterally offset from the guide region of the active zone, in which the largest
- electromagnetic radiation that can be generated by the semiconductor laser can be significantly improved.
- a basic idea is to make an end portion of the ridged structure on one side with respect to a center axis of the Ridgefigured so wide that a center of the Ridge Design
- a smaller broadening may be provided, e.g. a squint angle of the electromagnetic radiation in one
- a taper structure may be provided in the end region of the Ridge Geb which reduces feedback losses of the electromagnetic radiation due to the end section arranged on one side.
- the shape of the end portion can be selected in such a way that a Defining the level of the fracture facet when breaking is given. Furthermore, the efficiency of the semiconductor laser depending on the selected embodiment by a
- Layer sequence and can thus be applied to existing structures of layer sequences of semiconductor lasers.
- Fig. 1 shows a schematic representation of a
- the Ridgefigured 3 is aligned along a central axis 8.
- the Ridge Design 3 each at the ends of a one-sided
- the widening 5 is respectively arranged on the same side with respect to the center axis 8 of the Ridge Cook 7 and aligned substantially perpendicular to the center axis 8.
- the end portions 5 are made of the same material as the Ridge gleich 3 and are preferably applied simultaneously with the Ridge réelle 3 on the base body 2. Both the main body 2 and the RidgeWORK 3 and the
- End portions 5 are at the end surfaces 6 by a
- the end portion 5 has at least a width perpendicular to the center axis 8, which is wider than the width of the
- Electromagnetic radiation causes, wherein the
- a contact layer 4 is provided which covers the Ridgefigured 3 along the entire length and also a side of the part of the surface of the base body second
- the contact layer 4 may represent a bonding pad.
- FIG. 2 shows a schematic view of a facet 6 of the semiconductor laser of FIG. 1.
- one mesa trench 9 is introduced into the main body 2 in opposite lateral edge regions.
- Base 2 has a layer sequence of a laser diode with an active zone 10 for generating electromagnetic
- the Ridgeregal 3 represents a waveguide guide and leads to an embodiment of the guide region 40 for optical modes 12 of the electromagnetic radiation generated by the active zone 10.
- the optical mode 12 is shown schematically in the form of an ellipse below the ridge structure 3.
- the guide region extends over the width of the Ridge réelle 3.
- the end portion 5 has
- the end portion 5 is preferably made of the
- the guide portion 40 also on the facet 6, the width of the Ridge Vietnamese 3.
- the active zone 10 may be formed in the form of a simple pn layer or in the form of a quantum layer or a quantum well structure with different layer sequences.
- the end portion 5 is shown, wherein a dashed line 13 is a boundary between the
- the fracture direction extends from right to left.
- a greater width of the ridged structure 3 results in the plane of the facet 6, so that a center 15 of the ridged structure 3 is arranged laterally offset from the guide section 40 for the optical mode 12.
- the middle 15 is drawn by means of another dashed line.
- a transverse facet 16 is shown schematically on the facet 6. The transverse facet 16 arises when breaking at the middle 15 in the region of the active zone 10 and extends laterally outwardly in the direction of fracture, which is represented by an arrow 14. The transverse facet 16 moves forward shortly
- the end portion 5 extends from the Ridgefigured 3 up to a predetermined second width B2 perpendicular to the longitudinal extent of the Ridge Vietnamese 3.
- the end portion 5 adjoins the facet 6 and extends a predetermined length L parallel to the longitudinal extent of the Ridge Modell. 3
- FIG. 4 shows a section of a wafer 17 on which a plurality of semiconductor lasers 1 have been produced in a coherent manner.
- a Ridge Design 3 extends over several
- the semiconductor laser 1 are formed according to the embodiment of FIG. Between two
- Semiconductor lasers 1 each have an end portion 5 is formed as part of the Ridge Design 3, which extends laterally from the longitudinal axis of the Ridge Design 3 of the Ridge gleich 3 away.
- the wafer 17 is subdivided into sections, wherein the wafer 17
- Fig. 5 shows an enlarged view of a
- Fig. 6 shows a schematic representation of a
- the Ridge Design 3 has a width w perpendicular to a longitudinal extent of the Ridge réelle along a central axis 8.
- the Ridge Scheme 3 has a second
- End portion 18, which is opposite to the end portion. 5 is arranged and has a width b2 and a length ⁇ .
- the following condition is met, so that a
- Transverse facet is arranged offset laterally to the optical mode: bl> w + b2.
- the ridged structure 3 adjacent to the facet 6 is asymmetrical on one side, in Figure 6 asymmetrically wider on the left than on the right.
- the second end section 18 can also be dispensed with. Since an optical mode is typically slightly wider than the ridged structure 3, preferably the end portion 5 and the second end portion 18 may be dimensioned to satisfy the following condition: bl ⁇ w + 2 ym + b2. For further minimization of optical losses, the first and second end portions 5, 18 may be in this manner
- the Ridge Design 3 can be formed in an end region adjacent to the facet 6 on one side or on both sides by an additional lateral end portion 5, 18 wider, i. a one-sided
- End section 5 or additionally have a second end portion 18.
- An asymmetrically broadened ridge structure 3 points in the direction of optical beam propagation, i. in a longitudinal direction, a change in the ridging width.
- the wider end portion is located on the side into which the laser facet breaks when the facet splits.
- the Length of ⁇ may for example be less than 100 ⁇ m
- the length of ⁇ may advantageously be less than or equal to the Rayleigh length z R.
- n is the refractive index of the material or the effective refractive index of the laser mode, where the beam waist or, to a first approximation, the ridging width, M 2 is the diffraction factor of the laser.
- the electromagnetic radiation may leave the semiconductor laser partially at an angle not equal to 90 ° to the facet 6 and have a so-called squint angle in the far field.
- the squint angle results in an optical loss.
- the width b2 of the second end portion 18 may be so wide that the center of the ridge structure adjacent to the facet 6 is laterally of the guide portion 40 and the formation of the optical mode 12 is hardly or not disturbed.
- the width b2 of the second end portion 18 may be smaller than twice the ridging width w or smaller than once the ridging width.
- the following formula applies to the width b2 of the second end section 18: b2 ⁇ 0.0227-Az-w
- the following formula applies to the width b2 of the second end section 18: b2 ⁇ 0, 0227 ⁇ ⁇ ⁇ w / 2
- taper structure be provided.
- the taper structure provides a gradual broadening of the ridge structure along the
- side surfaces of the taper structure can have multiple stages.
- side surfaces of the taper structure can have multiple stages.
- Taper structure is that a broadened optical mode has a larger beam waist. This increases the Rayleigh length and the waveguide loss decreases compared to a lower Rayleigh length at the same propagation distance.
- FIGS. 7 to 11 show various forms of
- Taper structures 19, which are arranged in the transition region between a Ridgeregal 3 and an end portion 5 and a second end portion 18.
- the tapered structure 19 is formed as part of the Ridge Modell 3 and preferably has the same height as the Ridge réelle 3.
- FIG. 7 shows a ridged structure 3 which, adjacent to the facet 6, has a widened end region with an end section 5 and a second end section 18.
- Taper structure 19 is in the form of a conical structure
- FIG. 8 shows another embodiment in which the
- the first side surface 41 is formed as a flat surface.
- Fig. 9 shows a further embodiment, which in
- Taper structure 19 protrudes.
- FIG. 10 shows another embodiment which is shown in FIG.
- transition line 20 is further away from the end portion 5 and the second end portion 18 is arranged.
- the transition line 20 may, for example, be more than 10 ⁇ m, preferably more than 40 ⁇ m and more preferably more than 100 ⁇ m, spaced from the end section 5.
- the greater the distance t between the transition line 20 and the end section 5, i. the longer the tapering structure 19, the lower the waveguide losses. 10 the width of the tapered structure 19, beginning at the transition line 20, steadily increases in the direction of the end section 5, as in FIG.
- Fig. 11 shows an embodiment which substantially corresponds to the embodiment of Fig. 9, but wherein
- FIGS. 12 to 17 show further embodiments of semiconductor lasers 1 with ridged structures 3, which have tapered structures 19, wherein the end section 5 and / or the second end section 18 increases in length as the distance from a center axis 8 of the ridged structure 3 increases. in the extension parallel to the center axis 8 of the Ridge Jardin 3 decreases.
- FIG. 12 shows an embodiment which essentially corresponds to FIG.
- Embodiment of Fig. 9 corresponds.
- the end portion 5 has a further side surface 43, which is formed as a straight surface.
- the further side surface 43 runs at an acute angle to the facet 6.
- the further side surface 43 opens at a transition line 23 in one
- the second end portion 18 has a further second side surface 44 which is as straight
- the further second side surface 44 runs at an obtuse angle to the facet 6. In addition, the further second side surface 44 opens at one
- Transition line 23 at a fixed distance to the facet 6 in the first side surface 41 of the taper structure 19.
- the length of the end portion 5 and the second end portion 18, i. the extent parallel to the center axis 8 of the Ridge Design 3 decreases with decreasing distance from the facet 6 from.
- FIG. 13 shows an arrangement according to FIG. 12, but the end section 5 and the second end section 18 each have a tip 45 which is formed near the facet 6.
- the tip 45 is formed, for example, by the fact that, when the facet 6 breaks, the fracture plane does not lie exactly in the middle relative to the end section 5 and the second
- Fig. 14 shows another example in which the second
- End portion 18 adjacent the tip 45 has a notch 24 in the direction of the center axis 8.
- the notch 24 For example, it may be used to specify a starting plane 25 for fracturing the facet 6. Will the notch
- Fig. 15 shows another embodiment of a
- Taper structure 19 on a first side 21 of the Ridgepatented 3 merges with in a rounded first side surface 41 in a rounded further side surface 43 of the end portion 5.
- the further side surface 43 runs at an acute angle to the facet 6.
- the tapered structure 19 has a rectilinear second side surface 42 on the second side 22 of the ridge structure 3.
- the second side surface 42 runs from the transition line 20 in the direction of the
- FIG. 16 shows another embodiment in which the
- Fig. 17 shows an embodiment which is formed substantially in accordance with the embodiment of Fig. 16, but wherein the tapered structure 19 has a tip 45 and from a distance
- the Ridge Design formed approximately rectangular.
- the broadening of the Ridge Geb can take other forms, which by change of the local Stress distribution to cause an increased effect of broadening.
- FIG. 18 shows an embodiment of a semiconductor laser 1 with a Ridgepatented 3, an end portion 5 and a second end portion 18.
- the end portion 5 has a further side surface 43 which is disposed at an angle less than 90 to the center axis 8 of the Ridge réelle 3.
- the extension of the end portion 5 increases parallel to the center axis 8 of the Ridge Scheme 3 with increasing distance from the center axis 8.
- the second end portion 18 has a further second side surface 44, which at an angle greater than 90 ° to the center axis 8 of the Ridge Design. 3
- the second end portion 18 is formed in such a manner that the extension of the second
- End portion 18 parallel to the center axis 8 decreases with increasing distance from the center axis 8.
- Fig. 19 shows an embodiment which substantially corresponds to the embodiment of Fig. 18, but wherein no second end portion 18 is provided.
- FIG. 20 shows an embodiment in which the end section 5 has a further side face 43 which is at an angle greater than 90 ° to the center axis 8 of the ridge structure 3
- FIG. 21 essentially corresponds to the embodiment of FIG. 20, wherein the further side face 43 merges into the facet 6 at an acute angle.
- the end portion 5 of FIG. 22 widened starting from the Ridge Quilt 3 in a first stage 27 to a first width and with decreasing distance to the facet 6 at a second distance with a second stage 28 to a second larger width than in the first stage 27.
- FIG. 23 shows an embodiment of a semiconductor laser 1 with a ridged structure 3, which has an end section 5 on the first side 21 and a second end section 18 adjacent to the facet 6 on the second side 22.
- End portion 5 has a further side surface 43 which at an angle greater than 90 ° to the center axis 8 of
- the further side surface 43 merges into the facet 6 via a step.
- the second end portion 18 has a further second side surface 44, which is arranged at an angle greater than 90 ° to the center axis 8 of the Ridge Vietnamese 3.
- the second end portion 18 is in the way
- Fig. 24 shows an embodiment in which the end portion 5 and the second end portion 18 are formed in the shape of rectangles.
- the end portion 5 has a larger one
- Fig. 25 shows an embodiment which substantially corresponds to the embodiment of Fig. 18, but wherein the second end portion 18 is formed rectangular.
- Fig. 26 shows another embodiment, wherein
- End portion 5 and the second end portion 18 are each formed in the form of stretching corners and each have a recess 29, 30 in corner regions of the further side surface 43 and the other second side surface 44.
- the indentation 29, 30 rounds off corner areas of the end section 5 and of the second end section 18 with a concave shape.
- Fig. 27 shows a further embodiment, wherein the
- End portion 5 and the second end portion 18 are each formed in the form of stretching corners and each have a recess 29, 30 in corner regions of the further side surface 43 and the other second side surface 44.
- the indentation 29, 30 rounds off corner areas of the end section 5 and the second end section 18 with a convex shape.
- Fig. 28 shows another embodiment in which the first and second end portions are rectangular in shape.
- the second end portion 18 has a second indentation 30 adjacent to the facet 6.
- the second indentation 30 is provided in order to precisely predetermine a starting plane 25 when the semiconductor laser 1 is split. Dashed lines in Fig. 28, the split page is shown. Before splitting, the second recess 30 is in the form of a tapered groove
- Fig. 29 shows another embodiment in which the first and second end portions are rectangular in shape.
- the end portion 5 has a first indentation 29 adjacent to the facet 6.
- FIG. 30 shows an embodiment with a tapered structure 19 and an end section 5.
- the tapering structure 19 is formed in the form of a tapered groove.
- FIG. 30 shows an arrangement with a tapered structure 19, an end section 5 and a second end section 18. The end section 5 and the second end section 18 are
- the second end portion 18 has a second indentation 30 adjacent to the facet 6.
- the second indentation 30 is provided in order to precisely predetermine a starting plane 25 when the semiconductor laser 1 is split.
- the second recess 30 is formed in the form of a tapered groove.
- FIG. 32 shows a construction which is substantially in accordance with FIG. 28, but wherein the free edge of the further side face 43 of the end section 5 and the
- FIG. 33 shows another embodiment with a
- End portion 5 is arranged at an angle smaller than 90 ° to the center axis 8 of the Ridge Vietnamese 3.
- the further second side surface 44 of the second end portion 18 is arranged parallel to the further side surface 43 and preferably in a same plane.
- the end section 5 has an indentation 29 adjacent to the facet 6.
- the indentation 29 is formed in the form of a tapered groove. However, the indentations 29, 30 is not up in the
- End portions 18 of the described embodiments may be formed according to the conditions and formulas explained with reference to FIG.
- FIGS. 34 to 43 show various embodiments in which the contact layer is optimized for different boundary conditions in the mold.
- FIG. 34 shows a schematic representation of a part of a semiconductor laser 1 with a ridged structure 3 with a rectangular end section 5 and a rectangular second end section 18.
- a ridged structure 3 with a rectangular end section 5 and a rectangular second end section 18.
- On the ridged structure 3 is a
- FIG. 35 shows a part of another embodiment of a semiconductor laser 1 formed as shown in FIG. 34, but with only the end portion 5 provided and the second end portion 18 omitted.
- Fig. 36 shows a part of an embodiment of a
- the contact layer 4 is arranged in the form of a rectangular strip with a constant width over the Ridge réelle 3, the tapered structure 19 and the first and the second end portion 5, 18 and up to the Facet 6 is guided.
- the contact layer 4 has the width of the Ridge réelle 3.
- FIG. 37 shows a part of a further embodiment of a semiconductor laser 1, which is essentially formed according to FIG. 9, the contact layer 4 starting with the Transition line 20 increases in width in the direction of the facet 6 conically on both sides 21, 22, but not the entire width of the conical tapered structure 19 covered.
- FIG. 38 shows a part of a further embodiment of a semiconductor laser 1, which essentially corresponds to FIG. 34
- This embodiment has a higher level (COD level), from which a thermal
- FIG. 39 shows a part of a further embodiment of a semiconductor laser 1 which essentially corresponds to FIG. 34
- FIG. 40 shows a part of a further embodiment of a semiconductor laser 1, which essentially corresponds to FIG.
- Embodiment of Fig. 38 is formed, but wherein the contact layer 4 a fixed distance in front of the
- FIG. 41 shows a part of a further embodiment of a semiconductor laser 1, which is formed essentially in accordance with FIG. 35, wherein the contact layer 32 ends adjacent to the transition between the ridge structure 3 and the end section 5 at a fixed distance from the facet 6.
- FIG. 42 shows a part of a further embodiment of a semiconductor laser 1, which is substantially like FIG. 39
- Fig. 43 shows a part of another embodiment of a semiconductor laser 1 in which both the second end portion 18 and the end portion 5 are completely connected to the
- Contact layer 4 are covered. In this embodiment, the production is easy to perform.
- FIG. 44 shows a part of a further embodiment of a semiconductor laser 1 in which a plurality of ridge structures 3
- the Ridgepatenteden are arranged parallel or side by side on a base body 2 with an active zone.
- the Ridge réelleen are provided in an end region with a common end portion 5 and a common second end portion 18.
- End portion 18 are chosen so that the center 15 is arranged at a breaking direction, which is illustrated by means of the arrow 14, laterally adjacent to the guide portion 40 of the optical mode 12 of the last Ridge Design seen in the direction of fracture.
- Fig. 45 shows an example in which the end portion 5 and the second
- End portion 18 are formed in FIG. 18.
- FIG. 46 shows an example of a semiconductor laser 1, wherein in each case a contact layer 4 is applied to a Ridge Quilt 3. The two
- Contact layers 4 are electrically separated from each other executed.
- the contact layers 4 of different Ridge Schemeen 3 may also be formed as a continuous contact layer.
- the contact layer 4 can according to the illustrated examples depending on the desired embodiment in the
- Fig. 47 shows a schematic representation of a
- Limiting structure 33 is provided which improve the formation of electromagnetic radiation with respect to a far field. Corresponding examples of limiting structures are described, for example, in DE 10 2011 054 954 A1. The delimiting structure 33 may be combined with the various embodiments described in the previous text.
- FIG. 48 shows an embodiment of a semiconductor laser 1, which is formed according to FIG. 1, but on one side of the main body 2, which is arranged opposite to the end section 5, a breaking trench 47 is formed in the surface 11 of the main body 2.
- the trench 47 is at a fixed distance d to the Ridge réelle 3 and
- Breaking trench have a distance from the side surface 48.
- the Bruchgraben 47 can by means of a mechanical
- the fracture trench 47 can be introduced into the surface 11 of the base body 2 by a chemical etching process.
- the fracture trench 47 can be arranged in such a way that an end of the trench 152 facing the ridged structure 3 has a distance d of less than 300 ⁇ m, preferably less than 100 ⁇ m, particularly preferably less than 70 ⁇ m, from the
- Bruchgrabens 47 perpendicular to the end face 6 less than 100 ym, in particular less than 50ym, in particular less than 20ym amount.
- a depth T of the trench 47 perpendicular to the surface 11 of the main body 2 may be greater than 2 ym, in particular greater than 10 ym, in particular greater than a height of the Ridge Quilt 3 in the base body 2.
- These values for the depth T of the trench 47 may also be provided in the region of the mesa trench 9.
- a length L of the widened end section 5, 18 along a center axis 8 of the ridged structure 3 to the end face 6 can be less than 100 ⁇ m or preferably less than 50 ⁇ m and particularly preferably less than 20 ⁇ m.
- Figure 49 shows a schematic side view of
- Fig. 50 shows the plan view of a
- the trench may be introduced only into the surface of the mesa trench 9.
- Fault trench 47 may be guided to the side surface 48 of the semiconductor laser 1.
- FIG. 51 shows a section of a wafer 17 on which several semiconductor lasers 1 have been produced in a coherent manner.
- a Ridge Design 3 extends over several
- the semiconductor laser 1 is formed according to the embodiment of FIGS. 48 to 50.
- a trench 47 is provided for each end portion 5.
- the end sections 5 and the trenches 47 are arranged in a line.
- the trenches 47 adjoin the
- an end section 5 is formed in each case as part of the ridged structure 3, which extends laterally away from the ridged structure 3 away from the longitudinal axis of the ridged structure 3.
- the wafer 17 is subdivided into sections, the wafer 17 being perpendicular to the longitudinal extent of the ridged structure 3 in the region of the trenches 47 and in the region of the end sections 5
- Fig. 52 shows an enlarged view of a
- Fig. 53 shows a schematic representation of a
- the Ridge Design 3 has a width w perpendicular to a longitudinal extent of the Ridge réelle along a central axis 8.
- the Ridge Scheme 3 has a second
- End portion 18 which is disposed opposite to the end portion 5 and has a width b2 and a length ⁇ .
- the following condition is met, so that a
- Transverse facet is arranged offset laterally to the optical mode: bl> w + b2.
- the ridge structure 3 adjacent to the facet 6 is asymmetrical on one side, in FIG. 53 asymmetrically wider on the left side than on the right side.
- the second end section 18 can also be dispensed with. Since an optical mode is typically slightly wider than the ridged structure 3, preferably the end portion 5 and the second end portion 18 may be dimensioned to satisfy the following condition: bl ⁇ w + 2 ym + b2.
- a width Y of the trench 47 perpendicular to the end face 6 may be less than 100 .mu.m, in particular less than 50 .mu.m, in particular less than 20 .mu.m.
- the arrangement of the trench or trenches 47 can be provided in each embodiment of FIGS. 7 to 47.
- the main body 2 and the Ridge réelle 3 have
- a semiconductor layer sequence based on a III-V compound semiconductor material is, for example, a nitride compound semiconductor material such as aluminum n- indium- n - m- gallium m- nitride or a
- Phosphide such as aluminum n - Indiumi- n - m m gallium phosphide arsenide or a compound semiconductor material such as aluminum n -Indiumi- n _ m - gallium arsenide m, where n and m the following conditions
- the semiconductor layer sequence of the base body 2 comprises at least one active layer, which is designed to generate an electromagnetic radiation.
- the active layer contains at least one pn junction or, preferably, one or more quantum well structures.
- One generated by the active layer in operation is a quantum well structure.
- electromagnetic radiation is especially in the
- Spectral range between 380 nm and 550 nm or between 420 nm and 540 nm.
- the semiconductor layers are deposited on a wafer using an epitaxial growth process. End faces of the semiconductor lasers are formed by splitting the semiconductor material, in particular the
- a light block layer can be applied, the one
- Opening angle for the emission of electromagnetic radiation limited. In this way, the formation of the far field of the electromagnetic radiation is limited and thus positively influenced.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Geometry (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112014004713.9T DE112014004713A5 (de) | 2013-10-14 | 2014-10-14 | Halbleiterlaser mit einseitig verbreiterter Ridgestruktur |
US15/029,372 US10181700B2 (en) | 2013-10-14 | 2014-10-14 | Semiconductor laser having a ridge structure widened on one side |
CN201480056614.XA CN105637721B (zh) | 2013-10-14 | 2014-10-14 | 具有一侧上加宽的脊结构的半导体激光器 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013220641.0 | 2013-10-14 | ||
DE201310220641 DE102013220641A1 (de) | 2013-10-14 | 2013-10-14 | Halbleiterlaser mit einseitig verbreiterter Ridgestruktur |
Publications (1)
Publication Number | Publication Date |
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WO2015055644A1 true WO2015055644A1 (de) | 2015-04-23 |
Family
ID=51691069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2014/072004 WO2015055644A1 (de) | 2013-10-14 | 2014-10-14 | Halbleiterlaser mit einseitig verbreiterter ridgestruktur |
Country Status (4)
Country | Link |
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US (1) | US10181700B2 (de) |
CN (1) | CN105637721B (de) |
DE (2) | DE102013220641A1 (de) |
WO (1) | WO2015055644A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017077059A1 (de) | 2015-11-06 | 2017-05-11 | Osram Opto Semiconductors Gmbh | Halbleiterlaser und verfahren zum herstellen eines halbleiterlasers sowie wafer |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017117135A1 (de) | 2017-07-28 | 2019-01-31 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung einer Mehrzahl von Laserdioden und Laserdiode |
DE102018114133B4 (de) * | 2018-06-13 | 2024-05-08 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Halbleiterlaser und Herstellungsverfahren für einen Halbleiterlaser |
DE102018125496A1 (de) * | 2018-10-15 | 2020-04-16 | Osram Opto Semiconductors Gmbh | Halbleiterlaser und Herstellungsverfahren für Halbleiterlaser |
EP4167405A1 (de) | 2020-06-12 | 2023-04-19 | Nichia Corporation | Laserdiodenelement und herstellungsverfahren dafür |
DE102021211000A1 (de) | 2021-09-30 | 2023-03-30 | Trumpf Photonics, Inc. | Halbleiterlaserchip mit mindestens einem überstehenden Stegbereich |
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JP2006093614A (ja) * | 2004-09-27 | 2006-04-06 | Hamamatsu Photonics Kk | 半導体レーザ素子及び半導体レーザ素子アレイ |
US20090262771A1 (en) * | 2006-07-31 | 2009-10-22 | Sanyo Electric Co., Ltd. | Semiconductor laser device and method of manufacturing the same |
DE102011054954A1 (de) | 2011-10-31 | 2013-05-02 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung eines optoelektronischen Halbleiterbauteils und optoelektronischer Halbleiterlaser |
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US4730327A (en) * | 1985-12-16 | 1988-03-08 | Lytel Incorporated | Dual channel fabry-perot laser |
JP3822976B2 (ja) * | 1998-03-06 | 2006-09-20 | ソニー株式会社 | 半導体装置およびその製造方法 |
JP2000174385A (ja) * | 1998-07-15 | 2000-06-23 | Sony Corp | 半導体レ―ザ |
JP4077348B2 (ja) * | 2003-03-17 | 2008-04-16 | 松下電器産業株式会社 | 半導体レーザ装置およびそれを用いた光ピックアップ装置 |
DE102009058345B4 (de) * | 2009-12-15 | 2021-05-12 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Halbleiterlaser |
DE102011100175B4 (de) * | 2011-05-02 | 2021-12-23 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Laserlichtquelle mit einer Stegwellenleiterstruktur und einer Modenfilterstruktur |
-
2013
- 2013-10-14 DE DE201310220641 patent/DE102013220641A1/de not_active Withdrawn
-
2014
- 2014-10-14 WO PCT/EP2014/072004 patent/WO2015055644A1/de active Application Filing
- 2014-10-14 US US15/029,372 patent/US10181700B2/en not_active Expired - Fee Related
- 2014-10-14 CN CN201480056614.XA patent/CN105637721B/zh not_active Expired - Fee Related
- 2014-10-14 DE DE112014004713.9T patent/DE112014004713A5/de not_active Withdrawn
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JP2006093614A (ja) * | 2004-09-27 | 2006-04-06 | Hamamatsu Photonics Kk | 半導体レーザ素子及び半導体レーザ素子アレイ |
US20090262771A1 (en) * | 2006-07-31 | 2009-10-22 | Sanyo Electric Co., Ltd. | Semiconductor laser device and method of manufacturing the same |
DE102011054954A1 (de) | 2011-10-31 | 2013-05-02 | Osram Opto Semiconductors Gmbh | Verfahren zur Herstellung eines optoelektronischen Halbleiterbauteils und optoelektronischer Halbleiterlaser |
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Cited By (2)
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WO2017077059A1 (de) | 2015-11-06 | 2017-05-11 | Osram Opto Semiconductors Gmbh | Halbleiterlaser und verfahren zum herstellen eines halbleiterlasers sowie wafer |
DE102015119146A1 (de) | 2015-11-06 | 2017-05-11 | Osram Opto Semiconductors Gmbh | Halbleiterlaser und Verfahren zum Herstellen eines Halbleiterlasers sowie Wafer |
Also Published As
Publication number | Publication date |
---|---|
CN105637721B (zh) | 2022-01-14 |
US20160268775A1 (en) | 2016-09-15 |
US10181700B2 (en) | 2019-01-15 |
DE102013220641A1 (de) | 2015-04-16 |
CN105637721A (zh) | 2016-06-01 |
DE112014004713A5 (de) | 2016-07-21 |
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