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	Optical system for performing digital logic
	-
	1967-12-29
著作权人	RADIO CORPORATION OF AMERICA
专利号	GB1097066A
国家	英国
文献子类	授权发明
其他题名	Optical system for performing digital logic
英文摘要	1,097,066. Lasers. RADIO CORPORATION OF AMERICA. May 18, 1965 [May 25, 1964], No. 20954/65. Heading H1C. A semiconductor laser diode includes a junction region adapted for light signal amplification in a first direction and adapted for laser oscillation in a second intersecting direction. Portions of two opposite faces of a parallelepiped junction laser, Fig. 1 (not shown), are coated or cut to be partially reflective to maintain laser oscillations when the diode is d.c. biased, an output light signal being thereby emitted from these faces. The other two faces of the diode perpendicular to the planar junction are made non reflective by providing quarter wave non reflecting coatings or by being made optically rough so that an incident light signal on the edge of the junction of these faces passes along the junction and is amplified. When the optical power density in the region where laser oscillations occur exceeds the equilibrium point, Fig. 3 (not shown) the laser oscillations are quenched and the output light signal is extinguished. In the arrangement of Fig. 2 (not shown), a second diode laser constructed in the same way as the first, is arranged in tandem with the first so that laser oscillations of this second diode are also extinguished when a light input signal is applied. A logic gate which can be used to perform the NOR or NAND function, Fig. 4, employs two diodes arranged in parallel. Fig. 5 shows two similar regions 62, 64 arranged to constitute a bistable multivibrator, there being a light output at 72 or at 68 dependent upon which of the laser oscillations 76 and 82 are extinguished by the input light signals 66 and 70. A free running light signal oscillator, Fig. 6, comprises a single diode laser as in Fig. 1, wherein the output light laser oscillations are coupled back to the input light signal edge by an optical fibre, deposited film optical waveguide or mirrors. Included in the feedback path is an optical delay line.
公开日期	1967-12-29
申请日期	1965-05-18
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/42194]
专题	半导体激光器专利数据库
作者单位	RADIO CORPORATION OF AMERICA
推荐引用方式 GB/T 7714	-. Optical system for performing digital logic. GB1097066A. 1967-12-29.

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