Photonic device and optical coherence tomography apparatus including the photonic device as light source
First Claim
1. A photonic device comprising:
- a first cladding layer;
a second cladding layer; and
an active layer including an emitting layer and a barrier layer and being provided between the first cladding layer and the second cladding layer, the emitting layer emitting light in a spectrum having a center wavelength λ
c and a spectrum half-maximum width Δ
λ
,wherein at least one of the first cladding layer and the second cladding layer includes a light absorbing part for absorbing light having a wavelength of λ
s or less represented by the following Expression (1);
λ
s<
(λ
c−
(Δ
λ
/2))
(1), andwherein the light absorbing part comprises a light absorbing layer, the light emitted from the emitting layer has a spectrum center wavelength of 830 to 870 nm, and the light absorbing layer absorbs at least light having a wavelength of 790 nm or less.
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Accused Products
Abstract
Provided is a photonic device in which emission intensity in a short wavelength region is suppressed even in the case of increasing carrier injection density so as to obtain a wide spectrum half-maximum width as well as a high output. The photonic device includes: a first cladding layer; a second cladding layer; and an active layer including an emitting layer and a barrier layer and being provided between the first cladding layer and the second cladding layer, the emitting layer emitting light in a spectrum having a center wavelength λc and a spectrum half-maximum width Δλ, in which at least one of the first cladding layer and the second cladding layer includes a light absorbing part for absorbing light having a wavelength of λs or less represented by the following Expression (1):
λs<(λc−(Δλ/2)) (1).
11 Citations
12 Claims
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1. A photonic device comprising:
-
a first cladding layer; a second cladding layer; and an active layer including an emitting layer and a barrier layer and being provided between the first cladding layer and the second cladding layer, the emitting layer emitting light in a spectrum having a center wavelength λ
c and a spectrum half-maximum width Δ
λ
,wherein at least one of the first cladding layer and the second cladding layer includes a light absorbing part for absorbing light having a wavelength of λ
s or less represented by the following Expression (1);
λ
s<
(λ
c−
(Δ
λ
/2))
(1), andwherein the light absorbing part comprises a light absorbing layer, the light emitted from the emitting layer has a spectrum center wavelength of 830 to 870 nm, and the light absorbing layer absorbs at least light having a wavelength of 790 nm or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A photonic device comprising:
-
a first cladding layer; a second cladding layer; and an active layer including an emitting layer and a barrier layer and being provided between the first cladding layer and the second cladding layer, the emitting layer emitting light in a spectrum having a center wavelength λ
c and a spectrum half-maximum width Δ
λ
,wherein at least one of the first cladding layer and the second cladding layer includes a light absorbing part for absorbing light having a wavelength of λ
s or less represented by the following Expression (1);
λ
s<
(λ
c−
(Δ
λ
/2))
(1), andwherein the light absorbing part is provided at a distance of 30 nm or more and 150 nm or less from the emitting layer. - View Dependent Claims (10, 11, 12)
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Specification