发明名称 |
Phase control by active thermal adjustments in an external cavity laser |
摘要 |
A wavelength tuneable external-cavity laser module comprises a gain medium in thermal contact with a thermally stabilized substrate; an end mirror, and a phase element for controlling the phase of the optical beam and being positioned within the external cavity between the gain medium and the end mirror, wherein said phase element comprises a material having a refractive index that varies in response to changes in temperature and has a transmissivity substantially independent of wavelength across said predetermined wavelength range. The thermally-controllable phase element is configured so as to induce a phase variation that compensates the drop in the output power due to ageing or to external temperature variation. A heating element is placed in thermal contact to the phase element. By thermally controlling an intra-cavity phase element it is possible to vary continuously the output power as a function of the injection current. |
申请公布号 |
US8179930(B2) |
申请公布日期 |
2012.05.15 |
申请号 |
US20090519404 |
申请日期 |
2009.08.12 |
申请人 |
MUSIO MAURIZIO;ROSSI GIACOMO ANTONIO;BRAGHIERI ATTILIO;TIENFORTI MARCELLO;GOOGLE INC. |
发明人 |
MUSIO MAURIZIO;ROSSI GIACOMO ANTONIO;BRAGHIERI ATTILIO;TIENFORTI MARCELLO |
分类号 |
H01S3/04;H01S3/08;H01S3/10 |
主分类号 |
H01S3/04 |
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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