High power laser radiation conveying device utilizing variable section fiber optics

A laser radiation conveying device for high power radiation comprising;

• a first guide coupled stiffly to the laser source, including a variable section optical fiber core, a cladding and an external coating of plastic material, an input terminal face, and an output terminal face means for providing an input into an input terminal face of a connector for optical fibers;
• a second guide, including an optical fiber core, a cladding, an external plastic coating, an input terminal face means for providing an input to said second guide from an output terminal face of said connector for optical fibers, and an output terminal face;
• and
• said optical fiber core of said second guide has a variable diameter.

A laser radiation conveying device for high power radiation, characterized in that it comprises:

• a connector for optical fibers including an input section and an output section;
• a first guide coupled stiffly to a laser source, made of a varying-diameter section optical fiber core, a mantle and an external coating of plastic material, and including an input terminal face, and an output terminal face inserted into said input section of said connector for optical fibers;
• a second guide having an optical fiber core, a mantle and an external plastic coating, and including an input terminal face inserted into said output section of said connector for optical fibers, and an output terminal face;
• and
• said output terminal face of said optical fiber core of said second guide has a larger diameter than the remaining part of said optical fiber core.

A laser radiation conveying device for high power radiation, characterized in that it comprises:

• a connector for optical fibers including an input section and an output section;
• a first guide coupled stiffly to a laser source, made of a varying-diameter section optical fiber core, a mantle and an external coating of plastic material, and including an input terminal face, and an output terminal face inserted into said input section of said connector for optical fibers;
• a second guide having an optical fiber core, a mantle and an external plastic coating, and including an input terminal face inserted into said output section of said connector for optical fibers, and an output terminal face;
• and
• said connector for optical fibers comprises an optical fiber core, a mantle about said optical fiber core, an external coating about said mantle, an input terminal face of said optical fiber core equal in area to said output terminal face of said first guide optical fiber core, and an output terminal face of said optical fiber core equal in area to said input terminal face of said second guide optical fiber core.

A laser radiation conveying device for high power comprising:

• a connector for optical fibers including an input section and an output section;
• a first guide coupled stiffly to a laser source, made of a varying-diameter section optical fiber core, a mantle and an external coating of plastic material, and including an input terminal face, and an output terminal face inserted into said input section of said connector for optical fibers;
• a second guide having an optical fiber core, a mantle and an external plastic coating, and including an input terminal face inserted into said output section of said connector for optical fibers, and an output terminal face;
• said profile of said variable section of said optical fiber core of said first guide includes a portion of cosine curve having a length of at least fifty times as large as the greater diameter of said core corresponding to said input terminal face;
• and
• said output terminal portion of said optical fiber core of said second guide has a large diameter than the remaining part of said optical fiber core.

A laser radiation conveying device for high power radiation, characterized in that it comprises:

• a connector for optical fibers including an input section and an output section;
• a first guide coupled stiffly to a laser source, made of a varying-diameter section optical fiber core, a mantle and an external coating of plastic material, and including an input terminal face, and an output terminal face inserted into said input section of said connector for optical fibers;
• a second guide having an optical fiber core, a mantle and an external plastic coating, and including an input terminal face inserted into said output section of said connector for optical fibers, and an output terminal face;
• said profile of said variable section of said optical fiber core of said first guide includes a portion of cosine curve having a length of a least fifty times as large as the greater diameter of said core corresponding to said input terminal face;
• and
• an optical fiber core, a mantle about said optical fiber core, an external coating about said mantle, an input terminal face of said optical fiber core equal in area to said output terminal face of said first guide optical fiber core, and an output terminal face of said optical fiber core equal in area to said input terminal face of said second guide optical fiber core.

A laser radiation conveying device for high power radiation, comprising:

• a connector for optical fibers including an input section and an output section;
• a first guide coupled stiffly to a laser source, made of a varying-diameter section optical fiber core, a mantle and an external coating of plastic material, and including an input terminal face, and an output terminal face inserted into said input section of said connector for optical fibers;
• a second guide having an optical fiber core, a mantle and an external plastic coating, and including an input terminal face inserted into said output section of said connector for optical fibers, and an output terminal face;
• a matching element between said first and said second guide;
• said matching element including an optical fiber core of variable diameter, a cladding, a plastic external coating, an input terminal face equal in dimension to said output terminal face of said first guide optical fiber core, an output terminal face equal in dimension to said input terminal face of said second guide optical fiber core;
• and
• two of said connectors, one each between said matching element and each of said guides.