Semiconductor laser having a transparent light emitting section, and a process of producing the same
First Claim
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1. A semiconductor laser with a multilayer structure formed on a GaAs substrate, comprising:
- a laser activation section and a light emitting section simultaneously formed by a metal organic chemical vapor deposition process using a selective area growth mask to produce an effect that said laser activation section and said light emitting section differ in film thickness,said laser activation section including a laser activation layer whose laser oscillation wavelength is 0.8 to 1.1 μ
m, andsaid light emitting section including an optical waveguide layer, the optical waveguide layer having a broad forbidden band compared with the laser activation layer and having transparency with respect to the laser oscillation wavelength.
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Abstract
A semiconductor laser is produced by forming a laser activation section and a light emitting section having an InGaAsP layer as a quantum well on a GaAs substrate according to metal organic chemical vapor deposition by using a selective area growth mask, in such a manner that the laser activation section and the light emitting section have different film thicknesses. The laser activation section includes a laser activation layer whose oscillation wavelength is set to 0.8 to 1.1 μm, and the light emitting section includes an optical waveguide layer having a broader forbidden band than the laser activation layer.
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7 Claims
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1. A semiconductor laser with a multilayer structure formed on a GaAs substrate, comprising:
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a laser activation section and a light emitting section simultaneously formed by a metal organic chemical vapor deposition process using a selective area growth mask to produce an effect that said laser activation section and said light emitting section differ in film thickness, said laser activation section including a laser activation layer whose laser oscillation wavelength is 0.8 to 1.1 μ
m, andsaid light emitting section including an optical waveguide layer, the optical waveguide layer having a broad forbidden band compared with the laser activation layer and having transparency with respect to the laser oscillation wavelength. - View Dependent Claims (2, 3)
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4. A process of producing a semiconductor laser of multilayer structure provided with a light emitting section having transparency with respect to a laser oscillation wavelength of 0.8 to 1.1 μ
- m, comprising;
forming a pair of selective area growth masks on a GaAs substrate except for a region where a light emitting section is to be formed in such a manner that a region where a laser activation section is to be formed is situated between said pair of selective area growth masks; and forming multiple semiconductor layers on said laser activation section-forming region of the GaAs substrate by metal organic chemical vapor deposition by using the selective area growth masks, said multiple semiconductor layers comprising a laser activation layer of a laser activation section having a laser oscillation wavelength band of 0.8 to 1.1 μ
m, and wherein said laser activation section and said light emitting section are simultaneously formed by said metal organic chemical vapor deposition process. - View Dependent Claims (5)
- m, comprising;
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6. A process of producing a semiconductor laser of multilayer structure provided with a light emitting section having transparency with respect to a laser oscillation wavelength of 0.8 to 1.1 μ
- m, comprising;
forming selective area growth masks on a GaAs substrate in such a manner that a laser activation section-forming region on the GaAs substrate where a laser activation section is to be formed has a predetermined width free of the selective area growth masks, and such that a light emitting section-forming region contiguous with the laser activation section-forming region has a greater width free of the selective area growth masks than the predetermined width; and forming multiple semiconductor layers on said laser activation section-forming region of the GaAs substrate by metal organic chemical vapor deposition by using the selective area growth masks, said multiple semiconductor layers comprising a laser activation layer of the laser activation section having a laser oscillation wavelength band of 0.8 to 1.1 μ
m, and wherein said laser activation section and said light emitting section are simultaneously formed by said metal organic chemical vapor deposition process. - View Dependent Claims (7)
- m, comprising;
Specification