کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5019177 1467841 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An optical lever by using a mode-locked laser for angle measurement
ترجمه فارسی عنوان
یک اهرم نوری با استفاده از لیزر قفل شده با حالت برای اندازه گیری زاویه
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی


- An optical lever having a mode-locked laser has been developed.
- A Fabry-Pérot etalon has also been employed in the optical lever.
- The optical lever can realize a large measurement range up to 4.2°.
- The method has a potential of assuring the traceability of angle measurement.

A new concept of optical lever for angle measurement having an extended angular measurement range with a mode-locked laser as the light source, which is significantly extended from the conventional photodiode (PD)-type optical levers with a single frequency laser, is proposed. In the proposed concept, a collimated laser beam of the mode-locked laser is made incident to a grating reflector to generate a group of first-order diffracted beams from the grating reflector. Differing from a conventional PD-type optical lever employing a laser beam with a single frequency as the light source, the angle measurement range can be significantly expanded for the sake of the group of widely-spread first-order diffracted beams. In addition, the proposed optical lever has a potential of assuring the traceability of angle measurement by linking it to the optical frequency comb based on the mode-locked laser, which is employed as the national standard of time and frequency. In this paper, as a first step of this research, a mode-locked femtosecond laser is employed as the light source of the proposed optical lever. To distinguish each of the first-order diffracted beams generated with the combination of the mode-locked femtosecond laser and the diffraction grating having a grating period of 1.67 μm, a Fabry-Pérot etalon is employed in the setup of the optical lever to modulate the distance between two neighboring beams in the group of first-order diffracted beams. Experimental setups are developed, and basic experiments are carried out to verify the feasibility of the proposed optical lever.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Precision Engineering - Volume 47, January 2017, Pages 72-80
نویسندگان
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