Optical oscillation device and recording apparatus

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	Optical oscillation device and recording apparatus
其他题名	Optical oscillation device and recording apparatus
	FUJITA, GORO; MARUYAMA, TSUTOMU; KURAMOTO, MASARU; WATANABE, HIDEKI
	2015-05-14
专利权人	SONY CORPORATION
公开日期	2015-05-14
授权国家	美国
专利类型	发明申请
摘要	Provided is a recording apparatus including a self-excited oscillation semiconductor laser that has a double quantum well separate confinement heterostructure and includes a saturable absorber section to which a negative bias voltage is applied and a gain section into which a gain current is injected, an optical separation unit, an objective lens, a light reception element, a pulse detection unit, a reference signal generation unit, a phase comparison unit, a recording signal generation unit, and a control unit.
其他摘要	本发明提供一种记录装置，其包括具有双量子阱分离限制异质结构的自激振荡半导体激光器，并且包括施加负偏压的可饱和吸收部分和注入增益电流的增益部分，光学分离单元，物镜，光接收元件，脉冲检测单元，参考信号生成单元，相位比较单元，记录信号生成单元和控制单元。
主权项	A recording apparatus comprising: a self-excited oscillation semiconductor laser that has a double quantum well separate confinement heterostructure and includes a saturable absorber section to which a negative bias voltage is applied and a gain section into which a gain current is injected; an optical separation unit that separates an oscillated light beam from the self-excited oscillation semiconductor laser into two oscillated light beams; an objective lens that condenses one of the separated oscillated light beams on an optical recording medium; a light reception element that receives the other of the oscillated light beams separated by the optical separation unit; a pulse detection unit that detects a pulse of the oscillated light beam received by the light reception element; a reference signal generation unit that generates a master clock signal; a phase comparison unit that calculates a phase difference between the master clock signal and the pulse; a recording signal generation unit that generates a recording signal using a negative voltage at a timing of the master clock signal and applies the recording signal as the negative bias voltage to the saturable absorber unit of the self-excited oscillation semiconductor laser; and a control unit that controls an oscillation frequency of the self-excited oscillation semiconductor laser by changing the gain current to be injected into the gain section of the self-excited oscillation semiconductor laser or the negative bias voltage to be applied to the saturable absorber unit based on the phase difference.
申请日期	2012-07-10
专利号	US20150131425A9
专利状态	失效
申请号	US13/545688
公开（公告）号	US20150131425A9
IPC 分类号	G11B7/126 \| G11B7/1374 \| H01S5/065 \| H01S5/0625 \| H01S5/026 \| G11B7/1275 \| H01S5/34 \| H01S5/343
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/61781
专题	半导体激光器专利数据库
作者单位	SONY CORPORATION
推荐引用方式 GB/T 7714	FUJITA, GORO,MARUYAMA, TSUTOMU,KURAMOTO, MASARU,et al. Optical oscillation device and recording apparatus. US20150131425A9[P]. 2015-05-14.

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