发明名称 |
SURFACE EMITTING LASER, SURFACE EMITTING LASER ARRAY, OPTICAL SCANNING DEVICE, IMAGE FORMING APPARATUS, OPTICAL TRANSMISSION MODULE AND OPTICAL TRANSMISSION SYSTEM |
摘要 |
<p>A disclosed surface emitting laser is capable of being manufactured easily, having a higher yield and a longer service lifetime. In the surface emitting laser, a selectively-oxidized layer is included as a part of a low refractive index layer of an upper semiconductor distribution Bragg reflector; the low refractive index layer including the selectively- oxidized layer includes two intermediate layers adjoining the selectively-oxidized layer and two low refractive index layers adjoining the intermediate layers. Al content rate in the intermediate layers is lower than that in the selectively-oxidized layer, and Al content rate in the low refractive index layers is lower than that in the selectively-oxidized layer. This configuration enables providing more control over the thickness and oxidation rate of the oxidized layer, thereby enabling reducing the variation of the thickness of the oxidized layer.</p> |
申请公布号 |
WO2009064018(A1) |
申请公布日期 |
2009.05.22 |
申请号 |
WO2008JP71058 |
申请日期 |
2008.11.13 |
申请人 |
RICOH COMPANY, LTD.;SATO, SHUNICHI;ITOH, AKIHIRO;HINO, TAKESHI;JIKUTANI, NAOTO |
发明人 |
SATO, SHUNICHI;ITOH, AKIHIRO;HINO, TAKESHI;JIKUTANI, NAOTO |
分类号 |
H01S5/183;B41J2/44 |
主分类号 |
H01S5/183 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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