Misalignment-tolerant, grating-tuned external-cavity laser
Patent
·
OSTI ID:6451802
This patent describes a grating tuned laser system. It comprises: a laser amplifier that emits a laser beam along an optical axis A, the laser beam having a pair of lateral dimensions Wp and Wt where Wp is measured along a direction parallel to an axis P perpendicular to optical axis A and Wt is measured along a direction parallel to an axis T perpendicular to axes A and P. The lateral dimensions Wp and Wt being referred to herein as laser beam height and width, respectively; a grating positioned in the path of the laser beam and oriented relative to the laser amplifier to produce a diffraction order that retroreflects back to the laser amplifier, thereby forming an external cavity with the laser amplifier. The grating is rotatable about axis P to enable tuning of the laser amplifier. The grating contains a set of grating rulings that are substantially parallel to axis P and wherein a normal N to a front face of the grating at the intersection of the optical axis with the grating makes an angle {theta} with the optical axis A at the grating; and optical relay means.
- Assignee:
- Hewlett-Packard Co., Palo Alto, CA (USA)
- Patent Number(s):
- A; US 4942583
- Application Number:
- PPN: US s 7-208340
- OSTI ID:
- 6451802
- Country of Publication:
- United States
- Language:
- English
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