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An optical fibre to realize low-loss of terahertz wave

A low-loss, transmission fiber technology, applied in cladding fiber, optical waveguide and light guide, etc., can solve the problem that long-distance transmission cannot be realized

Inactive Publication Date: 2007-05-16
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the loss of various optical fibers in the THz frequency band reported in the literature has reached or exceeded 3900dB / km, and it is impossible to achieve long-distance transmission at all.

Method used

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  • An optical fibre to realize low-loss of terahertz wave

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] In this embodiment, to realize the optical fiber with a shorter transmission wavelength in the terahertz frequency band with the structure shown in Figure 1, the structural parameters are: r 0 = 10mm, n 2 = 1.52 (high density polyethylene), n 1 = 1, d 2 = 25 μm, d 1 =500 μm, N=3. According to the absorption spectrum of high-density polyethylene in the terahertz frequency band [Chem.Phys.Lett., Vol.10, No.4, PP.473-477, 1971], TE 01 Mode transmission loss (structural bound loss plus material absorption loss) is shown in Table 1. It can be seen from Table 1 that in the wavelength range of 70 μm to 200 μm, they are all below 4.1dB / km, while TE 01 The transmission loss of the mode at 90μm is as low as 0.463dB / km.

[0012] Table 1.r 0 = 10mm, n 2 = 1.52, n 1 = 1, d 2 = 25 μm, d 1 =500μm, N=3

[0013] wavelength

Embodiment 2

[0015] In this embodiment, to realize the optical fiber with a longer transmission wavelength in the terahertz frequency band with the structure shown in Figure 1, the structural parameters are: r 0 = 20mm, n 2 = 1.52 (high density polyethylene), n 1 = 1, d 2 = 150 μm, d 1 =2250 μm, N=3. TE 01 The transmission loss of the mode is shown in Table 2. It can be seen from Table 2 that in the wavelength range of 400 μm to 1100 μm, they are all below 4.5dB / km, while TE 01 The transmission loss of the mode at 550μm is as low as 1.071dB / km.

[0016] Table 2.r 0 = 20mm, n 2 = 1.52, n 1 = 1, d 2 = 150 μm, d 1 =2250μm, N=3

[0017] wavelength

Embodiment 3

[0019] In this embodiment, to realize the optical fiber with the transmission wavelength in the middle of the terahertz frequency band with the structure shown in Figure 1, the structural parameters are: r 0 = 14mm, n 2 = 1.52 (high density polyethylene), n 1 = 1, d 2 = 70 μm, d 1 =1050 μm, N=3. TE 01 The transmission loss of the mode is shown in Table 3. It can be seen from Table 3 that in the wavelength range of 200 μm to 550 μm, they are all below 4.5dB / km, while TE 01 The transmission loss of the mode at 280μm is as low as 1.262dB / km.

[0020] Table 3.r 0 = 14mm, n 2 = 1.52, n 1 = 1, d 2 = 70 μm, d 1 =1050μm, N=3

[0021] wavelength

(μm)

200

220

240

260

280

300

320

340

360

380

400

420

450

500

550

material absorption loss

Consumption(dB / cm)

3.63

2.92

2.41

2.04

1.77

1.57

1.39

1.2...

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Abstract

This invention relates to one special fiber and to one with low consumption of Hertz wave, which is characterized by the following: realizing THz wave transmission within range of 30 mum-3mm; using current two steps or one step to produce and the fiber materials can adopt plastic materials as base materials to absorb consumption, such as high intensity HDPE, low intensity LDPE, Teflon or TPX or polypropylene non polarization polymer.

Description

technical field [0001] The invention relates to a special optical fiber, in particular to a low-loss optical fiber capable of realizing terahertz waves. Background technique [0002] Terahertz (THz) waves with a frequency range of about 0.1 to 10 THz (wavelength about 3000 μm to 30 μm) are an important frequency band and the last frequency band to be developed in the electromagnetic spectrum. For a long time, due to the lack of effective THz radiation generation and detection methods, it has been in the gap state between microwave and far infrared. Due to a series of characteristics of THz wave and its important application value in spectrum, imaging, medical diagnosis, communication and radar, celestial bodies and basic physics research, it has attracted the attention of all countries in the world; and from March 14 to 16, 2005 The Optical THz Science and Technology Symposium was held in Florida, USA on the 1st. Consequently, many important advances have been made in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
Inventor 于荣金张冰
Owner YANSHAN UNIV
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