1990 Fiscal Year Final Research Report Summary
Fabrications of a Germanium Laser Tunable in a Far-Infrared Range from 70 to 300mum.
| Project/Area Number |
01850002
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied materials
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| Research Institution | College of Arts and Sciences, Univ, Tokyo |
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Principal Investigator |
KOMIYAMA Susumu Univ. Tokyo, Dept. of Pure & Applied Sciences, Associate Professor, 教養学部, 助教授 (00153677)
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| Co-Investigator(Kenkyū-buntansha) |
SHIRAKI Yasuhiro Univ. Tokyo, Research Center of Advanced Science & Technology, Associate Profess, 先端科学技術センター, 助教授 (00206286)
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| Project Period (FY) |
1989 – 1990
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| Keywords | Germanium laser / Far-infrared laser / Tunable wavelength |
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| Research Abstract |
1) Single-Wavelength-line oscillation using a Lameller type reflector
Single line oscillation was achieved by an optical resonator consisting of a Lameller type interference reflector and a concave mirror.
2) Single-wavelenth-line oscillation using a capacitive mesh mirror
Single line oscillation was achieved also by a combination of a capacitive mesh mirror faricated on a silicone-single-crystal substrate and a concave mirror.
3) High-resolution spectrum measurement by a heterodyne detection
Self-beat signal of simultaneous oscillating lines was detected with real-time- and wavelength-resolutions of 0.1 sec and 1MH_z, respectively, by operating a spectrum analyzer in a pulsed mode. The measurements revealed that line width of individual oscillation lines is extremely narrow, being around 4MH_z.
4) Improved Characteristics of Oscillation in Voight Configuration
Laser oscillation was achieved in Voight configuration, in which magnetic field is applied perpendicular to the axis of the optical resonator. This choice of configuration has led to significant improvements of the performance, such as a development of oscillation wavelength range, an increase in the intensity of long-wavelength oscillations, and an expansion of electric- and magnetic-field ranges for oscillation.
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