THORLABS Vytran LDC401, Руководство пользователя

Страница: 14 / 62

LDC401 & LDC401A Automated Cleavers Chapter 7: Cleaving
Page 10 TTN100064-D02
Chapter 7 Cleaving
7.1. Overview
The LDC401 and LDC401A cleave fiber using the tension-and-scribe technique as follows:
1. A stripped fiber is secured in Fiber Holding Blocks (FHBs).
2. The left FHB moves to the left, tensioning the fiber.
3. A diamond-coated blade approaches the fiber and makes a small scribe.
4. The tension causes the scribe to propagate through the fiber, resulting in a cleave.
To obtain an angled cleave, the fiber is twisted by a rotary stage before the fiber is tensioned (LDC401A only).
Figure 9 System Overview
This chapter provides an in-depth description of the manner in which fiber is cleaved using the LDC401 and
LDC401A Fiber Cleavers.
7.2. The Cleave Process
The cleaver utilizes two Fiber Holding Blocks (FHBs) to securely clamp and position the fiber prior to cleaving. The
left FHB has a linear drive mechanism for applying tension to the fiber. The right FHB is either stationary (LDC401)
or outfitted with a rotary drive mechanism for twisting the fiber (LDC401A). A load cell is incorporated into the left
FHB for monitoring fiber tension. Once the fiber is positioned and securely clamped in the FHBs, an automated
Cleave Process can be initiated by pressing the “Start” button.
Parameters that can be adjusted using the Tablet Controller are in bold . Descriptions of these parameters are
provided in Section 9.8. The majority of Users will only need to set the Fiber Diameter (cladding), Cleave Tension ,
and Pre-Cleave Advance while leaving the rest of the Parameters set to their default values.
The Cleave Process proceeds as follows:
1. For flat cleaves, the left FHB will slowly pull to the left until the specified Cleave Tension is reached. For
angled cleaves performed with the LDC401A, the right FHB will rotate to the specified Cleave Rotation
Angle , and then left FHB will slowly pull to the left until the specified Cleave Tension is reached.
2. While the fiber is held under tension (and rotated if performing an angled cleave), the diamond blade
advances towards the fiber. After the blade has traveled the Blade Pre-Cleave Advance distance,
it begins oscillating towards the fiber in small back-and-forth steps. As soon as the diamond blade contacts
the fiber it creates a small scribe, which rapidly propagates through the fiber due to the pre-applied tension.
FHB Lid
Cleave
Blade
Fiber Holding
Block (FHB)
Rotary Stage
(LDC401A only)
Micrometer
Backstop
Ruler Block
Lifting
Lever