发明名称 |
CONTROL METHOD OF DISTRIBUTED BRAGG REFLECTION SEMICONDUCTOR LASER, AND IMAGE PROJECTING APPARATUS |
摘要 |
A DBR semiconductor laser is controlled in an image projecting apparatus, which includes the DBR laser having a phase and DBR region, a light wavelength converting device for converting fundamental-wave light emitted from the DBR laser into second harmonic wave light, an optical deflector for scanning the second harmonic wave in a one or two-dimensional manner, and a modulating portion for modulating the DBR laser. Coefficient calculating and wavelength adjusting steps are performed within a non-drawing time. The coefficient calculating step calculates at least one coefficient in a relationship between a DBR current to be injected into the DBR region and a phase current to be injected into the phase region for continuously shifting the wavelength of the fundamental-wave light. The wavelength adjusting step changes DBR current injected into the DBR region and phase current injected into the phase region based on the relationship.
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申请公布号 |
US2009213886(A1) |
申请公布日期 |
2009.08.27 |
申请号 |
US20090363708 |
申请日期 |
2009.01.30 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
FUJII KAZUNARI;SAKATA HAJIME;FURUKAWA YUKIO |
分类号 |
G03B21/00;H01S3/10;H01S5/00;H01S5/06;H01S5/0625;H01S5/068;H01S5/0683;H01S5/125;H04N9/31 |
主分类号 |
G03B21/00 |
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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