Optical Fiber Module

• US 20080118207A1
• Filed: 01/23/2006
• Published: 05/22/2008
• Est. Priority Date: 01/24/2005
• Status: Abandoned Application

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Miyamoto, Toshiyuki, Yamamoto, Yoshinori
• Application Number:
  US11/795,596
• Publication Number:
  US 20080118207A1
• Time in Patent Office: Days
• US Class Current: 385/88
• CPC Class Codes: G02B 6/4452 Distribution frames
• CPC Class Codes: G02B 6/44524 with frame parts or auxiliary devices mounted on the frame and collectively not covering a whole width of the frame or rack cassettes G02B6/4453
• CPC Class Codes: G02B 6/44528 Patch-cords; Connector arrangements in the system or in the box routing arrangements H04Q1/00
• CPC Class Codes: G02B 6/4457 Bobbins; Reels

Abstract

An optical module is connected to external optical equipment with low loss, and excess length portion of a pigtail fiber does not cause an obstruction. The optical fiber module includes (1) a functional optical fiber; (2) a receptacle configured and arranged to accommodate the functional optical fiber; (3) a pigtail fiber that is connected to the functional optical fiber, and disposed so as to be extendable or retractable from the receptacle; and (4) a connecting terminal that is connected to the pigtail fiber, and to which external equipment is connected.

Claims

1. An optical fiber module comprising:

(1) a functional optical fiber;

(2) a receptacle configured and arranged to accommodate said functional optical fiber;

(3) a pigtail fiber that is connected to said functional optical fiber, and disposed so as to be extendable or retractable from said receptacle; and

(4) a connecting terminal that is connected to said pigtail fiber, and to which external equipment is connected.

2. The optical fiber module of claim 1, further comprising

an anchoring implement configured and arranged to hold an extension length of said pigtail fiber.

3. The optical fiber module of claim 1, further comprising

an excess-length take-up reel disposed inside said receptacle and configured and arranged to wind up an excess length portion of said pigtail fiber.

4. The optical fiber module of claim 3, further comprising

a ratchet wheel configured and arranged to allow said excess-length take-up reel to rotate in a single direction.

5. The optical fiber module of claim 3, wherein

said excess-length take-up reel is urged by a spring to retract said pigtail fiber into said receptacle.

6. The optical fiber module of claim 3, wherein

said excess-length take-up reel is arranged to be able to slide within said receptacle.

7. The optical fiber module of claim 1, wherein

said pigtail fiber has a loss of 0.1 dB or less at a wavelength of 1550 nm when wound ten turns with a diameter of 30 mm, a mode field diameter in a range of 8.2 μ

m to 9.0 μ

m at a wavelength of 1310 nm, a cable cutoff wavelength of 1260 nm or less, and a zero-dispersion wavelength in a range of 1300 nm to 1324 nm.

8. The optical fiber module of claim 2, further comprising

an excess-length take-up reel disposed inside said receptacle and configured and arranged to wind up a surplus length of said pigtail fiber.

9. The optical fiber module of claim 8, further comprising

a ratchet wheel configured and arranged to allow said excess-length take-up reel to rotate in a single direction.

10. The optical fiber module of claim 8, wherein

said pigtail fiber is urged to retract into said receptacle by a spring in said excess-length take-up reel.

11. The optical fiber module of claim 8, wherein

said excess-length take-up reel is arranged to be able to slide within said receptacle.