公开(公告)号：EP1367427A1

公开(公告)日：2003-12-03

申请号：EP02702737.4

申请日：2002-03-05

Applicant: JAPAN SCIENCE AND TECHNOLOGY CORPORATION

Inventor： YAMASHITA, Shinji

IPC: G02F1/01 ,  H01S3/07

CPC classification number: G02B6/274 ,  G02B6/024 ,  G02B6/2713 ,  G02B6/2766 ,  G02B6/29302 ,  G02B6/29395 ,  G02F1/0128 ,  G02F1/0134 ,  G02F1/0136 ,  G02F1/178 ,  G02F2203/15 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/0407 ,  H01S3/042 ,  H01S3/067 ,  H01S3/06704 ,  H01S3/06712 ,  H01S3/06791 ,  H01S3/08086 ,  H01S3/0941 ,  H01S3/1053 ,  H01S3/106 ,  H01S3/1067 ,  H01S3/1068 ,  H01S3/1608

Abstract: Characteristics are rendered variable and high-functional by using the side-pressure inductive polarization mode coupling of a PMF to thereby change the position and magnitude of a side pressure. An input light is incident via a polarizer (2), and an outgoing light is output via the PMF (1) and another polarizer (3). Light may enter and go out in an opposite way. The PMF (1) has two polarization axes orthogonal to each other, and the polarization axis of the polarizer (2) is coupled so as to agree with one end of the polarization axis of the PMF (1). The polarization axis of the polarizer (3) is coupled so as to agree with one end of the polarization axis of the PMF (1). The PMF (1) induces polarization mode coupling when a polarization light tilted a specified angle with respect to the polarization axis is incident to apply a side pressure to the PMF (1). Characteristics/functions can be changed by changing the position and the magnitude of a side pressure by an application unit (5) so that the length of the PMF (1) of a basic structure can be easily set precisely.

Abstract translation: 通过使用PMF的侧压感应极化模式耦合从而改变侧压力的位置和幅度，使特性变得可变和高功能。 输入光通过偏振器（2）入射，并且经由PMF（1）和另一偏振器（3）输出出射光。 灯光可能以相反的方式进出。 PMF（1）具有彼此正交的两个偏振轴，并且偏振器（2）的偏振轴被耦合以与PMF（1）的偏振轴的一端一致。 偏振器（3）的偏振轴被耦合以与PMF（1）的偏振轴的一端一致。 当相对于偏振轴倾斜指定角度的偏振光入射时，PMF（1）引起偏振模耦合，以向PMF（1）施加侧压。 可以通过施加单元（5）改变侧压力的位置和大小来改变特性/功能，使得可以容易地精确地设置基本结构的PMF（1）的长度。

公开(公告)号：EP1400819A1

公开(公告)日：2004-03-24

申请号：EP02733242.8

申请日：2002-05-29

Applicant: JAPAN SCIENCE AND TECHNOLOGY CORPORATION

Inventor： YAMASHITA, Shinji ,  NASU, Yusuke

IPC: G02B6/10 ,  G02B6/16

CPC classification number: G02B6/02138 ,  G02B6/02085 ,  G02B6/02114 ,  G02B6/02152

Abstract: A super structure fiber Bragg grating is produced without being limited by a phase mask length. First, a beam is allowed to scan with the relative position between a mask and an optical fiber fixed (step 1). Subsequently, the relative position between the mask and the optical fiber is moved in the lengthwise direction of the optical fiber (step 2). Besides, the beam is allowed to scan with the relative position between the mask and the optical fiber fixed as at the step 1. Next, in order to correct and match a phase deviation, the mask is removed, and a uniform ultraviolet beam is applied to the optical fiber, whereby a refractive index can be uniformly changed, and the optical length of the corresponding portion is changed to impart a phase shift (step 3). The phase shift-imparting position may be the place between both the fixed positions or any other suitable place. A phase shift amount is determined by an ultraviolet beam irradiation time (or light pulse number) , and if a necessary phase shift amount has been attained is determined while a reflection spectrum is being observed. The SSFBG of free length can be fabricated by repeating the above steps.

Abstract translation: 制造超结构光纤布拉格光栅，而不受相位掩模长度的限制。 首先，允许光束与掩模和固定的光纤之间的相对位置进行扫描（步骤1）。 随后，掩模和光纤之间的相对位置在光纤的长度方向上移动（步骤2）。 此外，如在步骤1中，光束被固定的掩模和光纤之间的相对位置扫描。接下来，为了校正和匹配相位偏移，去除掩模，并施加均匀的紫外线 由此可以均匀地改变折射率，并且改变对应部分的光学长度以赋予相移（步骤3）。 相移施加位置可以是两个固定位置或任何其它合适位置之间的位置。 通过紫外线照射时间（或光脉冲数）来确定相移量，并且在观察到反射光谱的同时确定已经获得必要的相移量。 可以通过重复上述步骤来制造自由长度的SSFBG。

公开(公告)号：EP1306718A1

公开(公告)日：2003-05-02

申请号：EP00963066.6

申请日：2000-10-03

Applicant: Japan Science and Technology Corporation

Inventor： YAMASHITA, Shinji ,  TORII, Kenichi

IPC: G02F1/35 ,  H04B10/18

CPC classification number: G02F1/3536 ,  G02F2001/211 ,  G02F2201/02 ,  G02F2203/06

Abstract: A wavelength converter which employs an optical fiber and has high converter efficiency. The polarization planes of a signal light and an exciting light outputted from a laser diode (LD) (103) are respectively controlled by polarization controllers (PC's) (101 and 104) and the phases of the lights are respectively modulated by phase modulators (PM's) (102 and 105) in accordance with modulation signals outputted from an oscillator (110). Then, the output lights from the PM's (102 and 105) are multiplexed by a coupler (106). After the multiplexed signal light and exciting light are amplified by an optical amplifier (EDFA) (107), they are inputted to a dispersion shift fiber (DSP) (108). After wavelength transformation (four light waves mixing (FWM)) is practiced in the DSP, an FWM light is outputted through a band-pass filter (BPF) (109).